GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Engine 🢒 Engine Controls and Fuel - 7.8L (LG4) 🢒 Diagnostic Trouble Code (DTC) List - Vehicle

DTC

DTC Descriptor

Module That Sets the DTC

Diagnostic Procedure

Important: 

   • For the 7.2L Caterpillar engine, refer to the appropriate Caterpillar Service Manual.
   • Do not clear any DTCs unless instructed to do so by a diagnostic procedure.
   • If any DTCs are Powertrain related DTCs, select Capture Info in order to store the DTC information with the scan tool.

Diagnose any current DTCs in the following order:

  1. DTCs that begin with a U
  2. Any of the following: B1000, B1001, C0550, P0601, P0602, P0603, P0604, P0605, P0606, P060B, P061C, P062C, P062F, P064C, P160C, P1621, P2108, or P2610
  3. Any of the following: C0899, C0900, P0562, or P0563
  4. Component level DTCs
  5. System level DTCs
  6. Any remaining DTCs

B0016

Passenger Frontal Deployment Loop Resistance Low

SDM

DTC B0016, B0017, or B0018

B0017

Passenger Frontal Deployment Loop Open

SDM

DTC B0016, B0017, or B0018

B0018

Passenger Frontal Deployment Loop Voltage Out of Range

SDM

DTC B0016, B0017, or B0018

B0022

Driver Frontal Deployment Loop Resistance Low

SDM

DTC B0022, B0024, or B0026

B0024

Driver Frontal Deployment Loop Voltage Out of Range

SDM

DTC B0022, B0024, or B0026

B0026

Driver Frontal Deployment Loop Open

SDM

DTC B0022, B0024, or B0026

B0051

Deployment Commanded

SDM

DTC B0051

B0053

Deployment Commanded with Loop DTCs Present

SDM

DTC B0053

B0077

Left Side Impact Sensor (SIS) Performance

SDM

DTC B0077, B0079, or B0080

B0079

Incorrect Left Side Impact Sensor (SIS) Installed

SDM

DTC B0077, B0079, or B0080

B0080

Discard Left Side Impact Sensor (SIS)

SDM

DTC B0077, B0079, or B0080

B0090

Active Switch Voltage Out of Range

SDM

DTC B0090

B0091

Active Switch: Wrong State

SDM

DTC B0091

B0540

Speedometer Circuit

IPC

DTC B0540

B0560

Tachometer Circuit

IPC

DTC B0560

B0775

Four Wheel Drive High Range (4HI) Indicator Circuit Malfunction

TCSCM

DTC B0775

B0780

Four Wheel Drive Low Range (4LO) Indicator Circuit Malfunction

TCSCM

DTC B0780

B0785

Two Wheel Drive High Range (2HI) Indicator Circuit Malfunction

TCSCM

DTC B0785

B0790

Transfer Case Neutral Indicator Circuit Malfunction

TCSCM

DTC B0790

B1000

Electronic Control Unit (ECU) Performance

SDM

DTC B1000

B1001

Option Configuration Error

SDM

DTC B1001

B1025

Left Front Audio Output Circuit

Radio

DTC B1025, B1035, B1045, or B1055

B1035

Right Front Audio Output Circuit

Radio

DTC B1025, B1035, B1045, or B1055

B1045

Left Rear Audio Output Circuit

Radio

DTC B1025, B1035, B1045, or B1055

B1055

Right Rear Audio Output Circuit

Radio

DTC B1025, B1035, B1045, or B1055

B1365

Device Ignition 0 Circuit

IPC

DTC B1365

B1372

Device Ignition 1 (ON and START) Circuit Low

IPC

DTC B1372

B2725

Active Transfer Case (ATC) Mode Switch Circuit

TCSCM

DTC B2725

B2745

Traction Control Switch Circuit

EBCM

DTC B2745

C086

Fluid Flow Switch Circuit High

EBCM

DTC C0035-C0052

C0035

Left Front Wheel Speed Sensor Circuit Low

EBCM

DTC C0035-C0052

C0036

Left Front Wheel Speed Sensor Circuit Range/Performance

EBCM

DTC C0035-C0052

C0037

Left Front Wheel Speed Sensor Circuit Low

EBCM

DTC C0035-C0052

C0040

Right Front Wheel Speed Sensor Circuit

EBCM

DTC C0035-C0052

C0041

Right Front Wheel Speed Sensor Circuit Range/Performance

EBCM

DTC C0035-C0052

C0042

Right Front Wheel Speed Sensor Circuit Low

EBCM

DTC C0035-C0052

C0046

Left Rear Wheel Speed Sensor Circuit Range/Performance

EBCM

DTC C0035-C0052

C0047

Left Rear Wheel Speed Sensor Circuit Low

EBCM

DTC C0035-C0052

C0051

Right Rear Wheel Speed Sensor Circuit Range/Performance

EBCM

DTC C0035-C0052

C0052

Right Rear Wheel Speed Sensor Circuit Low

EBCM

DTC C0035-C0052

C0110

Pump Motor Circuit

EBCM

DTC C0110

C0163

Antilock Brake System (ABS)/Traction Control System (TCS) Brake Switch Circuit Low

EBCM

DTC C0163 or C0164

C0164

Antilock Brake System (ABS)/Traction Control System (TCS) Brake Switch Circuit High

EBCM

DTC C0163 or C0164

C0220

Left Front Antilock Brake System (ABS) Channel in Release Too Long

EBCM

DTC C0220-C0229

C0221

Right Front Antilock Brake System (ABS) Channel in Release Too Long

EBCM

DTC C0220-C0229

C0222

Rear Antilock Brake System (ABS) Channel in Release Too Long

EBCM

DTC C0220-C0229

C0223

Left Front Antilock Brake System (ABS) Channel Motor Free Spins

EBCM

DTC C0220-C0229

C0224

Right Front Antilock Brake System (ABS) Channel Motor Free Spins

EBCM

DTC C0220-C0229

C0225

Rear Antilock Brake System (ABS) Channel Motor Free Spins

EBCM

DTC C0220-C0229

C0226

Left Front Traction Control System (TCS) Channel Will Not Move

EBCM

DTC C0220-C0229

C0227

Right Front Traction Control System (TCS) Channel Will Not Move

EBCM

DTC C0220-C0229

C0228

Left Rear Antilock Brake System (ABS) Channel in Release Too Long

EBCM

DTC C0220-C0229

C0229

Right Rear Antilock Brake System (ABS) Channel in Release Too Long

EBCM

DTC C0220-C0229

C0267

Low Brake Fluid Indicated

EBCM

DTC C0267

C0272

Base Brake Pump Motor Circuit

EBCM

DTC C0272

C0285

Brake Fluid Flow Switch Circuit Low

EBCM

DTC C0285

C0286

Brake Fluid Flow Switch Circuit High

EBCM

DTC C0286 or C086

C0306

Motor A or B Circuit

TCSCM

DTC C0306

C0327

Encoder Circuit

TCSCM

DTC C0327

C0359

Four Wheel Drive Low Range (4LO) Discrete Output Circuit

TCSCM

DTC C0359

C0550

Electronic Control Unit (ECU) Performance

EBCM

DTC C0550

ECU Malfunction

TCSCM

DTC C0550

C0899

Device Voltage Low

EBCM

DTC C0899

C0900

Device Voltage High

EBCM

DTC C0900

P0016

Crankcase Position (CKP)-Camshaft Position (CMP) Correlation

ECM
    •  DTC P0016 for the 6.6L (LBZ and LLY) engine
    •  DTC P0016 for the 6.6L (LMM) engine
    •  DTC P0016 for the 7.8L (LF8) engine

P0027

Exhaust Throttle Control valve Functional Check

ECM

DTC P0027

P003A

Turbocharger Boost Control Position Not Learned

ECM
    •  DTC P003A for the 6.6L (LBZ and LLY) engine
    •  DTC P003A for the 6.6L (LMM) engine
    •  DTC P003A for the 7.8L (LF8) engine

P0045

Turbocharger Vane Position Control Solenoid Control Circuit

ECM

DTC P0045 for the 6.6L (LMM) engine

or

DTC P0045 for the 7.8L (LF8) engine

P0047

Turbocharger Boost Control Solenoid Control Circuit Low Voltage

ECM

DTC P0047 or P0048

P0048

Turbocharger Boost Control Solenoid Control Circuit High Voltage

ECM

DTC P0047 or P0048

P0068

Throttle Body Airflow Performance

PCM

DTC P0068

P0079

Exhaust Throttle Control Valve Sensor Circuit Low Voltage

ECM

DTC P0079 or P0080

P0080

Exhaust Throttle Control Valve Sensor Circuit High Voltage

ECM

DTC P0079 or P0080

P0087

Fuel Rail Pressure (FRP) Too Low

ECM
    •  DTC P0087 or P0088 for the 6.6L (LBZ and LLY) engine
    •  DTC P0087 or P0088 for the 6.6L (LMM) engine
    •  DTC P0087 or P0088 for the 7.8L (LF8) engine
    •  DTC P0087 for the 7.8L (LG4) engine

P0088

Fuel Rail Pressure (FRP) Too High

ECM
    •  DTC P0087 or P0088 for the 6.6L (LBZ and LLY) engine
    •  DTC P0087 or P0088 for the 6.6L (LMM) engine
    •  DTC P0087 or P0088 for the 7.8L (LF8) engine
    •  DTC P0088 for the 7.8L (LG4) engine

P0089

Fuel Pressure Regulator Performance

ECM

DTC P0089

P0090

Fuel Pressure Regulator Control Circuit

ECM

DTC P0090 for the 6.6L (LBZ and LLY) engine

or

DTC P0090 for the 6.6L (LMM) engine

P0091

Fuel Pressure Regulator Solenoid 1 Control Circuit Low Voltage

ECM

DTC P0091 for the 7.8L (LG4) engine

or

DTC P0091 or P0092 for the 7.8L (LF8) engine

P0092

Fuel Pressure Regulator Solenoid 1 Control Circuit High Voltage

ECM

DTC P0092 for the 7.8L (LG4) engine

or

DTC P0091 or P0092 for the 7.8L (LF8) engine

P0093

Fuel System Large Leak Detected

ECM

DTC P0093

P0097

Intake Air Temperature (IAT) Sensor 2 Circuit Low Voltage

ECM

DTC P0097 or P0098 for the 6.6L (LBZ and LLY) engine

or

DTC P0097 or P0098 for the 6.6L (LMM) engine

P0098

Intake Air Temperature (IAT) Sensor 2 Circuit High Voltage

ECM

DTC P0097 or P0098 for the 6.6L (LBZ and LLY) engine

or

DTC P0097 or P0098 for the 6.6L (LMM) engine

P009E

Fuel Rail Pressure Relief Valve Performance

ECM

DTC P009E

P0101

Mass Air Flow (MAF) Sensor Performance

ECM
    •  DTC P0101 for the 6.6L (LBZ and LLY) engine
    •  DTC P0101 for the 6.6L (LMM) engine
    •  DTC P0101 for the 7.8L (LF8) engine

P0102

Mass Air Flow (MAF) Sensor Circuit Low Voltage

ECM

DTC P0102 or P0103 for the 6.6L (LBZ and LLY) engine

Mass Air Flow (MAF) Sensor Circuit Low Frequency

ECM, PCM
    •  DTC P0102 or P0103 for the 6.6L (LMM) engine
    •  DTC P0102 or P0103 for the 7.8L (LF8) engine
    •  DTC P0102 for the 8.1L engine

P0103

Mass Air Flow (MAF) Sensor Circuit High Voltage

ECM

DTC P0102 or P0103 for the 6.6L (LBZ and LLY) engine

Mass Air Flow (MAF) Sensor Circuit High Frequency

ECM, PCM
    •  DTC P0102 or P0103 for the 6.6L (LMM) engine
    •  DTC P0102 or P0103 for the 7.8L (LF8) engine
    •  DTC P0103 for the 8.1L engine

P0106

Manifold Absolute Pressure (MAP) Sensor Performance

ECM

DTC P0106 for the 6.6L (LBZ and LLY) engine

or

DTC P0106 for the 6.6L (LMM) engine

P0107

Barometric Pressure (BARO) Sensor Circuit Low Voltage

ECM

DTC P0107 for the 7.8L (LG4) engine

Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage

ECM, PCM
    •  DTC P0107 or P0108 for the 6.6L (LBZ and LLY) engine
    •  DTC P0107 or P0108 for the 6.6L (LMM) engine
    •  DTC P0107 for the 8.1L engine

P0108

Barometric Pressure (BARO) Sensor Circuit High Voltage

ECM

DTC P0108 for the 7.8L (LG4) engine

Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage

ECM, PCM
    •  DTC P0107 or P0108 for the 6.6L (LBZ and LLY) engine
    •  DTC P0107 or P0108 for the 6.6L (LMM) engine
    •  DTC P0108 for the 8.1L engine

P0112

Intake Air Temperature (IAT) Sensor Circuit Low Voltage

ECM, PCM
    •  DTC P0112 for the 7.8L (LG4) engine
    •  DTC P0112 or P0113 for the 7.8L (LF8) engine
    •  DTC P0112 for the 8.1L engine

Intake Air Temperature (IAT) Sensor 1 Circuit Low Voltage

ECM
    •  DTC P0112 or P0113 for the 6.6L (LBZ and LLY) engine
    •  DTC P0112 or P0113 for the 6.6L (LMM) engine

P0113

Intake Air Temperature (IAT) Sensor Circuit High Voltage

ECM, PCM
    •  DTC P0113 for the 7.8L (LG4) engine
    •  DTC P0112 or P0113 for the 7.8L (LF8) engine
    •  DTC P0113 for the 8.1L engine

Intake Air Temperature (IAT) Sensor 1 Circuit High Voltage

ECM
    •  DTC P0112 or P0113 for the 6.6L (LBZ and LLY) engine
    •  DTC P0112 or P0113 for the 6.6L (LMM) engine

P0116

Engine Coolant Temperature (ECT) Sensor Performance

ECM
    •  DTC P0116 for the 6.6L (LBZ and LLY) engine
    •  DTC P0116 for the 6.6L (LMM) engine
    •  DTC P0116 for the 7.8L (LF8) engine

P0117

Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage

ECM, PCM
    •  DTC P0117 or P0118 for the 6.6L (LBZ and LLY) engine
    •  DTC P0117 or P0118 for the 6.6L (LMM) engine
    •  DTC P0117 or P0118 for the 7.8L (LF8) engine
    •  DTC P0117 for the 7.8L (LG4) engine
    •  DTC P0117 for the 8.1L engine

P0118

Engine Coolant Temperature (ECT) Sensor Circuit High Voltage

ECM, PCM
    •  DTC P0117 or P0118 for the 6.6L (LBZ and LLY) engine
    •  DTC P0117 or P0118 for the 6.6L (LMM) engine
    •  DTC P0117 or P0118 for the 7.8L (LF8) engine
    •  DTC P0118 for the 7.8L (LG4) engine
    •  DTC P0118 for the 8.1L engine

P011A

Engine Coolant Temperature (ECT) Sensor 1-2 Correlation

ECM

DTC P011A

P0120

Throttle Position (TP) Sensor 1 Circuit

PCM

DTC P0120

P0126

Engine Coolant Temperature (ECT) Insufficient For Stable Operation

ECM

DTC P0126

P0128

Engine Coolant Temperature (ECT) Below Thermostat Regulating Temperature

ECM

DTC P0128 for the 7.8L (LF8) engine

P0131

HO2S Circuit Low Voltage Bank 1 Sensor 1

PCM

DTC P0131 or P0151

P0132

HO2S Circuit High Voltage Bank 1 Sensor 1

PCM

DTC P0132 or P0152

P0134

HO2S Circuit Insufficient Activity Bank 1 Sensor 1

PCM

DTC P0134 or P0154

P0151

HO2S Circuit Low Voltage Bank 2 Sensor 1

PCM

DTC P0131 or P0151

P0152

HO2S Circuit High Voltage Bank 2 Sensor 1

PCM

DTC P0132 or P0152

P0154

HO2S Circuit Insufficient Activity Bank 2 Sensor 1

PCM

DTC P0134 or P0154

P0168

Engine Fuel Overtemperature

ECM

DTC P0168 for the 6.6L (LBZ and LLY) engine

or

DTC P0168 for the 6.6L (LMM) engine

P0181

Fuel Temperature Sensor Performance

ECM
    •  DTC P0181 for the 6.6L (LBZ and LLY) engine
    •  DTC P0181 for the 6.6L (LMM) engine
    •  DTC P0181 for the 7.8L (LF8) engine

P0182

Fuel Temperature Sensor Circuit Low Voltage

ECM
    •  DTC P0182 or P0183 for the 6.6L (LBZ and LLY) engine
    •  DTC P0182 or P0183 for the 6.6L (LMM) engine
    •  DTC P0182 for the 7.8L (LG4) engine
    •  DTC P0182 or P0183 for the 7.8L (LF8) engine

P0183

Fuel Temperature Sensor High Voltage

ECM
    •  DTC P0182 or P0183 for the 6.6L (LBZ and LLY) engine
    •  DTC P0182 or P0183 for the 6.6L (LMM) engine
    •  DTC P0183 for the 7.8L (LG4) engine
    •  DTC P0182 or P0183 for the 7.8L (LF8) engine

P0191

Fuel Rail Pressure (FRP) Sensor Performance

ECM
    •  DTC P0191, P0192, or P0193 for the 6.6L (LBZ and LLY) engine
    •  DTC P0191 for the 6.6L (LMM) engine
    •  DTC P0191 for the 7.8L (LF8) engine

P0192

Fuel Rail Pressure (FRP) Sensor Circuit Low Voltage

ECM
    •  DTC P0191, P0192, or P0193 for the 6.6L (LBZ and LLY) engine
    •  DTC P0192 or P0193 for the 6.6L (LMM) engine
    •  DTC P0192 or P0193 for the 7.8L (LF8) engine
    •  DTC P0192 for the 7.8L (LG4) engine

P0193

Fuel Rail Pressure (FRP) Sensor Circuit High Voltage

ECM
    •  DTC P0191, P0192, or P0193 for the 6.6L (LBZ and LLY) engine
    •  DTC P0192 or P0193 for the 6.6L (LMM) engine
    •  DTC P0192 or P0193 for the 7.8L (LF8) engine
    •  DTC P0193 for the 7.8L (LG4) engine

P0200

Injector Control Circuit

PCM

DTC P0200

P0201

Injector 1 Control Circuit

ECM
    •  DTC P0201, P0202, P0203, P0204, P0205, P0206, P0207, or P0208 for the 6.6L (LBZ and LLY) engine
    •  DTC P0201, P0202, P0203, P0204, P0205, or P0206 for the 7.8L (LF8) engine
    •  DTC P0201, P0202, P0203, P0204, P0205, or P0206 for the 7.8L (LG4) engine

P0202

Injector 2 Control Circuit

ECM
    •  DTC P0201, P0202, P0203, P0204, P0205, P0206, P0207, or P0208 for the 6.6L (LBZ and LLY) engine
    •  DTC P0201, P0202, P0203, P0204, P0205, or P0206 for the 7.8L (LF8) engine
    •  DTC P0201, P0202, P0203, P0204, P0205, or P0206 for the 7.8L (LG4) engine

P0203

Injector 3 Control Circuit

ECM
    •  DTC P0201, P0202, P0203, P0204, P0205, P0206, P0207, or P0208 for the 6.6L (LBZ and LLY) engine
    •  DTC P0201, P0202, P0203, P0204, P0205, or P0206 for the 7.8L (LF8) engine
    •  DTC P0201, P0202, P0203, P0204, P0205, or P0206 for the 7.8L (LG4) engine

P0204

Injector 4 Control Circuit

ECM
    •  DTC P0201, P0202, P0203, P0204, P0205, P0206, P0207, or P0208 for the 6.6L (LBZ and LLY) engine
    •  DTC P0201, P0202, P0203, P0204, P0205, or P0206 for the 7.8L (LF8) engine
    •  DTC P0201, P0202, P0203, P0204, P0205, or P0206 for the 7.8L (LG4) engine

P0205

Injector 5 Control Circuit

ECM
    •  DTC P0201, P0202, P0203, P0204, P0205, P0206, P0207, or P0208 for the 6.6L (LBZ and LLY) engine
    •  DTC P0201, P0202, P0203, P0204, P0205, or P0206 for the 7.8L (LF8) engine
    •  DTC P0201, P0202, P0203, P0204, P0205, or P0206 for the 7.8L (LG4) engine

P0206

Injector 6 Control Circuit

ECM
    •  DTC P0201, P0202, P0203, P0204, P0205, P0206, P0207, or P0208 for the 6.6L (LBZ and LLY) engine
    •  DTC P0201, P0202, P0203, P0204, P0205, or P0206 for the 7.8L (LF8) engine
    •  DTC P0201, P0202, P0203, P0204, P0205, or P0206 for the 7.8L (LG4) engine

P0207

Injector 7 Control Circuit

ECM

DTC P0201, P0202, P0203, P0204, P0205, P0206, P0207, or P0208 for the 6.6L (LBZ and LLY) engine

or

DTC P0201, P0202, P0203, P0204, P0205, P0206, P0207, or P0208 for the 6.6L (LMM) engine

P0208

Injector 8 Control Circuit

ECM

DTC P0201, P0202, P0203, P0204, P0205, P0206, P0207, or P0208 for the 6.6L (LBZ and LLY) engine

or

DTC P0201, P0202, P0203, P0204, P0205, P0206, P0207, or P0208 for the 6.6L (LMM) engine

P0219

Engine Overspeed

ECM

DTC P0219 for the 7.8L (LF8) engine

or

DTC P0219 for the 7.8L (LG4) engine

P0220

Throttle Position (TP) Sensor 2 Circuit

PCM

DTC P0220

P0230

Fuel Pump Relay Control Circuit

ECM, PCM

DTC P0230 for the 8.1L engine

P0234

Turbocharger Engine Overboost

ECM
    •  DTC P0234 for the 6.6L (LBZ and LLY) engine
    •  DTC P0234 for the 6.6L (LMM) engine
    •  DTC P0234 for the 7.8L (LF8) engine
    •  DTC P0234 for the 7.8L (LG4) engine

P0237

Turbocharger Boost Sensor Circuit Low Voltage

ECM

DTC P0237 or P0238 for the 7.8L (LF8) engine

or

DTC P0237 for the 7.8L (LG4) engine

P0238

Turbocharger Boost Sensor Circuit High Voltage

ECM

DTC P0237 or P0238 for the 7.8L (LF8) engine

or

DTC P0238 for the 7.8L (LG4) engine

P0261

Injector 1 Control Circuit Low Voltage

ECM

DTC P0261, P0264, P0267, P0270, P0273, or P0276

P0264

Injector 2 Control Circuit Low Voltage

ECM

DTC P0261, P0264, P0267, P0270, P0273, or P0276

P0267

Injector 3 Control Circuit Low Voltage

ECM

DTC P0261, P0264, P0267, P0270, P0273, or P0276

P0270

Injector 4 Control Circuit Low Voltage

ECM

DTC P0261, P0264, P0267, P0270, P0273, or P0276

P0273

Injector 5 Control Circuit Low Voltage

ECM

DTC P0261, P0264, P0267, P0270, P0273, or P0276

P0276

Injector 6 Control Circuit Low Voltage

ECM

DTC P0261, P0264, P0267, P0270, P0273, or P0276

P0299

Turbocharger Engine Underboost

ECM
    •  DTC P0299 for the 6.6L (LBZ and LLY) engine
    •  DTC P0299 for the 6.6L (LMM) engine
    •  DTC P0299 for the 7.8L (LF8) engine

P029D

Injector 1 Leak

ECM

DTC P029D, P02A1, P02A5, P02A9, P02AD, P02B1, P02B5, or P02B9

P02A1

Injector 2 Leak

ECM

DTC P029D, P02A1, P02A5, P02A9, P02AD, P02B1, P02B5, or P02B9

P02A5

Injector 3 Leak

ECM

DTC P029D, P02A1, P02A5, P02A9, P02AD, P02B1, P02B5, or P02B9

P02A9

Injector 4 Leak

ECM

DTC P029D, P02A1, P02A5, P02A9, P02AD, P02B1, P02B5, or P02B9

P02AD

Injector 5 Leak

ECM

DTC P029D, P02A1, P02A5, P02A9, P02AD, P02B1, P02B5, or P02B9

P02B1

Injector 6 Leak

ECM

DTC P029D, P02A1, P02A5, P02A9, P02AD, P02B1, P02B5, or P02B9

P02B5

Injector 7 Leak

ECM

DTC P029D, P02A1, P02A5, P02A9, P02AD, P02B1, P02B5, or P02B9

P02B9

Injector 8 Leak

ECM

DTC P029D, P02A1, P02A5, P02A9, P02AD, P02B1, P02B5, or P02B9

P02E0

Diesel Intake Air (IA) Flow Control Circuit

ECM

DTC P02E0

P02E2

Diesel Intake Air (IA) Flow Control Circuit Low Voltage

ECM

DTC P02E2 or P02E3

P02E3

Diesel Intake Air (IA) Flow Control Circuit High Voltage

ECM

DTC P02E2 or P02E3

P02E7

Diesel Intake Air (IA) Flow Position Sensor Performance

ECM

DTC P02E7 for the 6.6L (LMM) engine

or

DTC P02E7 for the 7.8L (LF8) engine

P02E8

Diesel Intake Air (IA) Flow Position Sensor Circuit Low Voltage

ECM

DTC P02E8 or P02E9 for the 6.6L (LMM) engine

or

DTC P02E8 or P02E9 for the 7.8L (LF8) engine

P02E9

Diesel Intake Air (IA) Flow Position Sensor Circuit High Voltage

ECM

DTC P02E8 or P02E9 for the 6.6L (LMM) engine

or

DTC P02E8 or P02E9 for the 7.8L (LF8) engine

P0300

Engine Misfire Detected

ECM

DTC P0300-P0308 for the 6.6L (LBZ and LLY) engine

or

DTC P0300-P0308 for the 6.6L (LMM) engine

P0301

Cylinder 1 Misfire Detected

ECM

DTC P0300-P0308 for the 6.6L (LBZ and LLY) engine

or

DTC P0300-P0308 for the 6.6L (LMM) engine

P0302

Cylinder 2 Misfire Detected

ECM

DTC P0300-P0308 for the 6.6L (LBZ and LLY) engine

or

DTC P0300-P0308 for the 6.6L (LMM) engine

P0303

Cylinder 3 Misfire Detected

ECM

DTC P0300-P0308 for the 6.6L (LBZ and LLY) engine

or

DTC P0300-P0308 for the 6.6L (LMM) engine

P0304

Cylinder 4 Misfire Detected

ECM

DTC P0300-P0308 for the 6.6L (LBZ and LLY) engine

or

DTC P0300-P0308 for the 6.6L (LMM) engine

P0305

Cylinder 5 Misfire Detected

ECM

DTC P0300-P0308 for the 6.6L (LBZ and LLY) engine

or

DTC P0300-P0308 for the 6.6L (LMM) engine

P0306

Cylinder 6 Misfire Detected

ECM

DTC P0300-P0308 for the 6.6L (LBZ and LLY) engine

or

DTC P0300-P0308 for the 6.6L (LMM) engine

P0307

Cylinder 7 Misfire Detected

ECM

DTC P0300-P0308 for the 6.6L (LBZ and LLY) engine

or

DTC P0300-P0308 for the 6.6L (LMM) engine

P0308

Cylinder 8 Misfire Detected

ECM

DTC P0300-P0308 for the 6.6L (LBZ and LLY) engine

or

DTC P0300-P0308 for the 6.6L (LMM) engine

P0315

Crankshaft Position (CKP) System Variation Not Learned

PCM

DTC P0315

P0325

Knock Sensor (KS) Circuit

PCM

DTC P0325

P0327

Knock Sensor (KS) 1 Circuit Low Frequency

PCM

DTC P0327 or P0332

P0332

Knock Sensor (KS) 2 Circuit Low Frequency

PCM

DTC P0327 or P0332

P0335

Crankshaft Position (CKP) Sensor Circuit

ECM, PCM
    •  DTC P0335 or P0336 for the 6.6L (LBZ and LLY) engine
    •  DTC P0335 or P0336 for the 6.6L (LMM) engine
    •  DTC P0335 for the 7.8L (LG4) engine
    •  DTC P0335 or P0336 for the 7.8L (LF8) engine
    •  DTC P0335 for the 8.1L engine

P0336

Crankshaft Position (CKP) Sensor Performance

ECM, PCM
    •  DTC P0335 or P0336 for the 6.6L (LBZ and LLY) engine
    •  DTC P0335 or P0336 for the 6.6L (LMM) engine
    •  DTC P0335 or P0336 for the 7.8L (LF8) engine
    •  DTC P0336 for the 8.1L engine

P0340

Camshaft Position (CMP) Sensor Circuit

ECM
    •  DTC P0340 or P0341 for the 6.6L (LBZ and LLY) engine
    •  DTC P0340 or P0341 for the 6.6L (LMM) engine
    •  DTC P0340 or P0341 for the 7.8L (LF8) engine

P0341

Camshaft Position (CMP) Sensor Performance

ECM, PCM
    •  DTC P0340 or P0341 for the 6.6L (LBZ and LLY) engine
    •  DTC P0340 or P0341 for the 6.6L (LMM) engine
    •  DTC P0340 or P0341 for the 7.8L (LF8) engine
    •  DTC P0341 for the 8.1L engine

P0342

Camshaft Position (CMP) Sensor Circuit Low Voltage

PCM

DTC P0342

P0343

Camshaft Position (CMP) Sensor Circuit High Voltage

PCM

DTC P0343

P0351

Ignition Coil 1 Control Circuit

PCM

DTC P0351-P0358

P0352

Ignition Coil 2 Control Circuit

PCM

DTC P0351-P0358

P0353

Ignition Coil 3 Control Circuit

PCM

DTC P0351-P0358

P0354

Ignition Coil 4 Control Circuit

PCM

DTC P0351-P0358

P0355

Ignition Coil 5 Control Circuit

PCM

DTC P0351-P0358

P0356

Ignition Coil 6 Control Circuit

PCM

DTC P0351-P0358

P0357

Ignition Coil 7 Control Circuit

PCM

DTC P0351-P0358

P0358

Ignition Coil 8 Control Circuit

PCM

DTC P0351-P0358

P0381

Wait to Start Lamp Control Circuit

ECM

DTC P0381

P0382

Glow Plug/Heater Relay Control Circuit

ECM

DTC P0382

P0385

Crankshaft Position (CKP) Sensor B Circuit

ECM

DTC P0385

P0401

Exhaust Gas Recirculation (EGR) Flow Insufficient

ECM
    •  DTC P0401 for the 6.6L (LBZ and LLY) engine
    •  DTC P0401 or P0402 for the 6.6L (LMM) engine
    •  DTC P0401 for the 7.8L (LF8) engine

P0402

Exhaust Gas Recirculation (EGR) Flow Excessive

ECM
    •  DTC P0402 for the 6.6L (LBZ and LLY) engine
    •  DTC P0401 or P0402 for the 6.6L (LMM) engine
    •  DTC P0402 for the 7.8L (LF8) engine

P0403

Exhaust Gas Recirculation (EGR) Solenoid Control Circuit

ECM
    •  DTC P0403 for the 6.6L (LBZ and LLY) engine
    •  DTC P0403 or P046C for the 6.6L (LMM) engine
    •  DTC P0403 for the 7.8L (LF8) engine

P0404

Exhaust Gas Recirculation (EGR) Open Position Performance

ECM

DTC P0404

P0405

Exhaust Gas Recirculation (EGR) Position Sensor Circuit Low Voltage

ECM

DTC P0405 for the 6.6L (LBZ and LLY) engine

or

DTC P0405 or P0406 for the 6.6L (LMM) engine

P0406

Exhaust Gas Recirculation (EGR) Position Sensor Circuit High Voltage

ECM

DTC P0406 for the 6.6L (LBZ and LLY) engine

or

DTC P0405 or P0406 for the 6.6L (LMM) engine

P0409

Exhaust Gas Recirculation (EGR) Position Sensor Performance

ECM

DTC P0409

P040B

Exhaust Gas Recirculation (EGR) Temperature Sensor 1 Performance

ECM

DTC P040B

P040C

Exhaust Gas Recirculation (EGR) Temperature Sensor 1 Circuit Low Voltage

ECM

DTC P040C or P040D

P040D

Exhaust Gas Recirculation (EGR) Temperature Sensor 1 Circuit High Voltage

ECM

DTC P040C or P040D

P041B

Exhaust Gas Recirculation (EGR) Temperature Sensor 2 Performance

ECM

DTC P041B

P041C

Exhaust Gas Recirculation (EGR) Temperature Sensor 2 Circuit Low Voltage

ECM

DTC P041C or P041D

P041D

Exhaust Gas Recirculation (EGR) Temperature Sensor 2 Circuit High Voltage

ECM

DTC P041C or P041D

P0420

Catalyst System Low Efficiency

ECM

DTC P0420

P042E

Exhaust Gas Recirculation (EGR) Closed Position Performance

ECM

DTC P042E

P0443

Evaporative Emission (EVAP) Purge Solenoid Control Circuit

PCM

DTC P0443

P0461

Fuel Level Sensor 1 Performance

ECM, PCM

DTC P0461

P0462

Fuel Level Sensor 1 Circuit Low Voltage

ECM, PCM

DTC P0462

P0463

Fuel Level Sensor 1 Circuit High Voltage

ECM, PCM

DTC P0463

P046C

Exhaust Gas Recirculation (EGR) Position Sensor Performance

ECM

DTC P046C for the 6.6L (LBZ and LLY) engine

or

DTC P0403 or P046C for the 6.6L (LMM) engine

P0480

Cooling Fan Relay Control Circuit

ECM, PCM

DTC P0480

P0483

Cooling Fan System Performance

ECM, PCM

DTC P0483 or P0493

P0493

Cooling Fan Overspeed

PCM

DTC P0483 or P0493

P0495

Cooling Fan Speed High

ECM, PCM

DTC P0495

P0502

Vehicle Speed Sensor (VSS) Circuit Low Voltage

ECM

DTC P0502 for the 6.6L (LBZ and LLY) engine

or

DTC P0502 for the 6.6L (LMM) engine

P0504

Brake Switch Circuit 1-2 Correlation

ECM

DTC P0504

P0506

Idle Speed Low

ECM, PCM
    •  DTC P0506 or P0507 for the 6.6L (LMM) engine
    •  DTC P0506 or P0507 for the 7.8L (LF8) engine
    •  DTC P0506 or P0507 for the 8.1L engine

P0507

Idle Speed High

ECM, PCM
    •  DTC P0506 or P0507 for the 6.6L (LMM) engine
    •  DTC P0506 or P0507 for the 7.8L (LF8) engine
    •  DTC P0506 or P0507 for the 8.1L engine

P0512

Start Switch Circuit

ECM, PCM

DTC P0512

P0522

Engine Oil Pressure (EOP) Sensor Circuit Low Voltage

ECM, PCM

DTC P0522

P0523

Engine Oil Pressure (EOP) Sensor Circuit High Voltage

ECM, PCM

DTC P0523

P0526

Cooling Fan Speed Sensor Circuit

ECM, PCM

DTC P0526

P0530

Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit

ECM, PCM

DTC P0530 or P0531

P0531

Air Conditioning (A/C) Refrigerant Pressure Sensor Performance

ECM, PCM

DTC P0530 or P0531

P0532

Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit Low Voltage

ECM, PCM

DTC P0532 or P0533

P0533

Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit High Voltage

ECM, PCM

DTC P0532 or P0533

P0540

Intake Air (IA) Heater Feedback Circuit

ECM

DTC P0540

P0545

Exhaust Gas Temperature (EGT) Sensor 1 Circuit Low Voltage

ECM

DTC P0545 or P0546

P0546

Exhaust Gas Temperature (EGT) Sensor 1 Circuit High Voltage

ECM

DTC P0545 or P0546

P0562

System Voltage Low

ECM, PCM

DTC P0562

P0563

System Voltage High

ECM, PCM

DTC P0563

P0565

Cruise Control Switch Circuit

ECM, PCM

DTC P0565

P0567

Cruise Control Resume Switch Circuit

ECM, PCM

DTC P0567

P0568

Cruise Control Set Switch Circuit

ECM, PCM

DTC P0568

P0571

Cruise Control Brake Switch Circuit

ECM, PCM

DTC P0571

P0601

Control Module Read Only Memory (ROM)

ECM, PCM

DTC P0601, P0602, P0603, P0604, P0605, P0606, or P062F for the 7.8L (LF8) engine

or

DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 for the 8.1L engine

P0602

Control Module Not Programmed

ECM, PCM
    •  DTC P0602, P0606, P060B, P061C, P062C, P062F, or P2610 for the 6.6L (LMM) engine
    •  DTC P0601, P0602, P0603, P0604, P0605, P0606, or P062F for the 7.8L (LF8) engine

P0603

Control Module Long Term Memory Reset

ECM

P0604

Control Module Random Access Memory (RAM)

ECM, PCM
    •  DTC P0601, P0602, P0603, P0604, P0605, P0606, or P062F for the 7.8L (LF8) engine

P0605

Control Module Programming Read Only Memory (ROM)

ECM
    •  DTC P0601, P0602, P0603, P0604, P0605, P0606, or P062F for the 7.8L (LF8) engine

P0606

Control Module Internal Performance

ECM, PCM
    •  DTC P0602, P0606, P060B, P061C, P062C, P062F, or P2610 for the 6.6L (LMM) engine
    •  DTC P0601, P0602, P0603, P0604, P0605, P0606, or P062F for the 7.8L (LF8) engine

P0607

Control Module Internal Performance

ECM, PCM

P0608

Vehicle Speed Output Circuit

ECM, PCM

DTC P0608

P060B

Control Module Analog to Digital Performance

ECM

DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P060B, P061C, P062C, P062F, or P2610 for the 6.6L (LBZ and LLY) engine

or

DTC P0602, P0606, P060B, P061C, P062C, P062F, or P2610 for the 6.6L (LMM) engine

P0615

Starter Relay Control Circuit

ECM, PCM

DTC P0615

P061C

Control Module Engine Speed Performance

ECM

DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P060B, P061C, P062C, P062F, or P2610 for the 6.6L (LBZ and LLY) engine

or

DTC P0602, P0606, P060B, P061C, P062C, P062F, or P2610 for the 6.6L (LMM) engine

P0621

Generator L-Terminal Circuit

ECM

DTC P0621

P0622

Generator F-Terminal Circuit

ECM, PCM

DTC P0622

P062C

Control Module Vehicle Speed Performance

ECM

DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P060B, P061C, P062C, P062F, or P2610 for the 6.6L (LBZ and LLY) engine

or

DTC P0602, P0606, P060B, P061C, P062C, P062F, or P2610 for the 6.6L (LMM) engine

P062F

Control Module Long Term Memory Performance

ECM
    •  DTC P0602, P0606, P060B, P061C, P062C, P062F, or P2610 for the 6.6L (LMM) engine
    •  DTC P0601, P0602, P0603, P0604, P0605, P0606, or P062F for the 7.8L (LF8) engine

P0640

Intake Air (IA) Heater Control Circuit

ECM

DTC P0640

P0641

5-Volt Reference 1 Circuit

ECM, PCM

DTC P0641 for the 7.8L (LG4) engine

or

DTC P0641 for the 8.1L engine

P0642

5-Volt Reference 1 Circuit Low Voltage

ECM
    •  DTC P0642 or P0643 for the 6.6L (LBZ and LLY) engine
    •  DTC P0642 or P0643 for the 6.6L (LMM) engine
    •  DTC P0642 or P0643 for the 7.8L (LF8) engine

P0643

5-Volt Reference 1 Circuit High Voltage

ECM
    •  DTC P0642 or P0643 for the 6.6L (LBZ and LLY) engine
    •  DTC P0642 or P0643 for the 6.6L (LMM) engine
    •  DTC P0642 or P0643 for the 7.8L (LF8) engine

P0646

Air Conditioning (A/C) Clutch Relay Control Circuit Low Voltage

ECM, PCM

DTC P0646 or P0647

P0647

Air Conditioning (A/C) Clutch Relay Control Circuit High Voltage

ECM, PCM

DTC P0646 or P0647

P064C

Glow Plug Module Control Performance

GPCM

DTC P064C for the 6.6L (LBZ and LLY) engine

or

DTC P064C for the 6.6L (LMM) engine

P0650

Malfunction Indicator Lamp (MIL) Control Circuit

ECM, PCM
    •  DTC P0650 for the 6.6L (LBZ and LLY) engine
    •  DTC P0650 for the 6.6L (LMM) engine
    •  DTC P0650 for the 7.8L (LF8) engine
    •  DTC P0650 for the 8.1L engine

P0651

5-Volt Reference 2 Circuit

ECM, PCM

DTC P0651 for the 7.8L (LG4) engine

or

DTC P0651 for the 8.1L engine

P0652

5-Volt Reference 2 Circuit Low Voltage

ECM
    •  DTC P0652 or P0653 for the 6.6L (LBZ and LLY) engine
    •  DTC P0652 or P0653 for the 6.6L (LMM) engine
    •  DTC P0652 or P0653 for the 7.8L (LF8) engine

P0653

5-Volt Reference 2 Circuit HIGH Voltage

ECM
    •  DTC P0652 or P0653 for the 6.6L (LBZ and LLY) engine
    •  DTC P0652 or P0653 for the 6.6L (LMM) engine
    •  DTC P0652 or P0653 for the 7.8L (LF8) engine

P0654

Engine Speed Output Circuit

ECM, PCM

DTC P0654

P0671

Glow Plug 1 Control Circuit

ECM

DTC P0671-P0678 for the 6.6L (LBZ and LLY) engine

or

DTC P0671-P0678 for the 6.6L (LMM) engine

P0672

Glow Plug 2 Control Circuit

ECM

DTC P0671-P0678 for the 6.6L (LBZ and LLY) engine

or

DTC P0671-P0678 for the 6.6L (LMM) engine

P0673

Glow Plug 3 Control Circuit

ECM

DTC P0671-P0678 for the 6.6L (LBZ and LLY) engine

or

DTC P0671-P0678 for the 6.6L (LMM) engine

P0674

Glow Plug 4 Control Circuit

ECM

DTC P0671-P0678 for the 6.6L (LBZ and LLY) engine

or

DTC P0671-P0678 for the 6.6L (LMM) engine

P0675

Glow Plug 5 Control Circuit

ECM

DTC P0671-P0678 for the 6.6L (LBZ and LLY) engine

or

DTC P0671-P0678 for the 6.6L (LMM) engine

P0676

Glow Plug 6 Control Circuit

ECM

DTC P0671-P0678 for the 6.6L (LBZ and LLY) engine

or

DTC P0671-P0678 for the 6.6L (LMM) engine

P0677

Glow Plug 7 Control Circuit

ECM

DTC P0671-P0678 for the 6.6L (LBZ and LLY) engine

or

DTC P0671-P0678 for the 6.6L (LMM) engine

P0678

Glow Plug 8 Control Circuit

ECM

DTC P0671-P0678 for the 6.6L (LBZ and LLY) engine

or

DTC P0671-P0678 for the 6.6L (LMM) engine

P0687

Engine Controls Ignition Relay Control Circuit High Voltage

ECM

DTC P0687

P0698

5-Volt Reference 3 Circuit Low Voltage

ECM
    •  DTC P0698 or P0699 for the 6.6L (LBZ and LLY) engine
    •  DTC P0698 or P0699 for the 6.6L (LMM) engine
    •  DTC P0698 or P0699 for the 7.8L (LF8) engine

P0699

5-Volt Reference 3 Circuit High Voltage

ECM
    •  DTC P0698 or P0699 for the 6.6L (LBZ and LLY) engine
    •  DTC P0698 or P0699 for the 6.6L (LMM) engine
    •  DTC P0698 or P0699 for the 7.8L (LF8) engine

P0851

Park/Neutral Position (PNP) Switch Circuit Low Voltage

ECM

DTC P0851 or P0852 for the 6.6L (LBZ and LLY) engine

or

DTC P0851 or P0852 for the 6.6L (LMM) engine

P0852

Park/Neutral Position (PNP) Switch Circuit High Voltage

ECM

DTC P0851 or P0852 for the 6.6L (LBZ and LLY) engine

or

DTC P0851 or P0852 for the 6.6L (LMM) engine

P0856

Engine Control Module (ECM) Indicated TCS Malfunction

ECM

DTC P0856

P1085

Fuel System Overpressure

ECM

DTC P1085 or P1295

P1087

Fuel Rail Pressure (FRP) Trim Too Low

ECM

DTC P1087

P1088

Fuel Rail Pressure (FRP) Trim Too High

ECM

DTC P1088

P1093

Fuel Rail Pressure Low During Power Enrichment

ECM

DTC P1093

P1125

Accelerator Pedal Position (APP) System

ECM, PCM
    •  DTC P1125 for the 7.8L (LF8) engine
    •  DTC P1125 for the 7.8L (LG4) engine
    •  DTC P1125 for the 8.1L engine

P1224

Injector 1 Control Circuit Shorted

ECM

DTC P1224, P1227, P122A, P1233, P1236, P1239, P1242, or P1247

P1227

Injector 2 Control Circuit Shorted

ECM

DTC P1224, P1227, P122A, P1233, P1236, P1239, P1242, or P1247

P122A

Injector 3 Control Circuit Shorted

ECM

DTC P1224, P1227, P122A, P1233, P1236, P1239, P1242, or P1247

P1233

Injector 4 Control Circuit Shorted

ECM

DTC P1224, P1227, P122A, P1233, P1236, P1239, P1242, or P1247

P1236

Injector 5 Control Circuit Shorted

ECM

DTC P1224, P1227, P122A, P1233, P1236, P1239, P1242, or P1247

P1239

Injector 6 Control Circuit Shorted

ECM

DTC P1224, P1227, P122A, P1233, P1236, P1239, P1242, or P1247

P1242

Injector 7 Control Circuit Shorted

ECM

DTC P1224, P1227, P122A, P1233, P1236, P1239, P1242, or P1247

P1247

Injector 8 Control Circuit Shorted

ECM

DTC P1224, P1227, P122A, P1233, P1236, P1239, P1242, or P1247

P1261

Injector Positive Voltage Control Circuit

ECM

DTC P1261

P1263

Injector Positive Voltage Control Circuit Group 1 Low Voltage

ECM

DTC P1263

P1264

Injector Positive Voltage Control Circuit Group 1 High Voltage

ECM

DTC P1264

P1265

Injector Positive Voltage Control Circuit Group 2 Low Voltage

ECM

DTC P1265

P1266

Injector Positive Voltage Control Circuit Group 2 High Voltage

ECM

DTC P1266

P1271

Accelerator Pedal Position (APP) Sensor 1-2 Correlation

ECM

DTC P1271

P1272

Accelerator Pedal Position (APP) Sensor 2-3 Correlation

ECM

DTC P1272

P1273

Accelerator Pedal Position (APP) Sensor 1-3 Correlation

ECM

DTC P1273

P1277

Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage

ECM

DTC P1277

P1278

Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage

ECM

DTC P1278

P1282

Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

ECM

DTC P1282

P1283

Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage

ECM

DTC P1283

P1287

Accelerator Pedal Position (APP) Sensor 3 Circuit Low Voltage

ECM

DTC P1287

P1288

Accelerator Pedal Position (APP) Sensor 3 Circuit High Voltage

ECM

DTC P1288

P1293

Injector Circuit Low to High Current Transition Time Bank 1

ECM

DTC P1293

P1295

Injector Circuit High to Low Current Transition Time Bank 1

ECM

DTC P1085 or P1295

P1448

Diesel Particulate Filter Regeneration Frequency Too Low

ECM

DTC P1448

P150C

Transmission Control Module (TCM) Engine Speed Request Circuit

ECM

DTC P150C for the 6.6L (LBZ and LLY) engine

or

DTC P150C for the 6.6L (LMM) engine

P1516

Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance

PCM

DTC P1516

P1539

Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit Low Voltage

ECM, PCM

DTC P1539 or P1546

P1546

Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit High Voltage

ECM, PCM

DTC P1539 or P1546

P154A

Intake Air (IA) Heater Feedback Circuit

GPCM

DTC P154A

P154B

Intake Air (IA) Heater Voltage Signal Circuit

GPCM

DTC P154B

P154C

Intake Air (IA) Heater Current Signal Circuit

GPCM

DTC P154C

P154D

Intake Air (IA) Heater Temperature Signal Circuit

GPCM

DTC P154D

P1574

Stop Lamp Switch Circuit

PCM

DTC P1574

P1600

Control Module Internal Performance

PCM

DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 for the 7.8L (LG4) engine

or

DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 for the 8.1L engine

P160B

Injector Calibration Incorrect

ECM

DTC P160B

P160C

Engine Calibration Information Not Programmed - GPCM

ECM, GPCM

DTC P160C for the 6.6L (LBZ and LLY) engine

or

DTC P160C for the 6.6L (LMM) engine

P1621

Control Module Long Term Memory Performance

ECM

DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 for the 7.8L (LG4) engine

or

DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 for the 8.1L engine

P1627

Control Module Long Term Memory Performance

ECM

DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 for the 7.8L (LG4) engine

or

DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 for the 8.1L engine

P1646

5-Volt Reference 3 Circuit

ECM

DTC P1646

P166B

Intake Air (IA) Heater Feedback Circuit

ECM

DTC P166B

P166C

Intake Air (IA) Heater Voltage Signal Circuit

GPCM

DTC P166C

P1680

Control module Ignition

PCM

DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 for the 7.8L (LG4)

or

DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 for the 8.1L engine

P1681

Control module Ignition

PCM

DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 for the 7.8L (LG4)

or

DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 for the 8.1L engine

P1683

Control module Ignition

PCM

DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 for the 7.8L (LG4)

or

DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 for the 8.1L engine

P2002

Diesel Particulate Filter Low Efficiency

ECM

DTC P2002 for the 6.6L (LMM) engine

or

DTC P2002 for the 7.8L (LF8) engine

P2003

Mass Air Flow (MAF) Sensor Circuit Low Voltage

ECM

DTC P2003

P2004

Mass Air Flow (MAF) Sensor Circuit High Voltage

ECM

DTC P2004

P2005

Power Take Off (PTO) Sensor Circuit High Voltage

ECM

DTC P2005

P2007

Turbocharger Boost Control Solenoid Control Circuit High Voltage

ECM

DTC P2007

P2008

Turbocharger Boost Control Solenoid Control Circuit Low Voltage

ECM

DTC P2008

P2011

Injector Positive Voltage Control Circuit Group 3

ECM

DTC P2011

P2012

Injector Positive Voltage Control Circuit Group 4

ECM

DTC P2012

P2032

Exhaust Gas Temperature (EGT) Sensor 2 Circuit Low Voltage

ECM

DTC P2032 or P2033 for the 6.6L (LMM) engine

or

DTC P2032 or P2033 for the 7.8L (LF8) engine

P2033

Exhaust Gas Temperature (EGT) Sensor 2 Circuit High Voltage

ECM

DTC P2032 or P2033 for the 6.6L (LMM) engine

or

DTC P2032 or P2033 for the 7.8L (LF8) engine

P2066

Fuel Level Sensor 2 Performance

ECM, PCM

DTC P2066

P2067

Fuel Level Sensor 2 Circuit Low Voltage

ECM, PCM

DTC P2067

P2068

Fuel Level Sensor 2 Circuit High Voltage

ECM, PCM

DTC P2068

P2084

Exhaust Gas Temperature (EGT) Sensor 2 Performance

ECM

DTC P2084

P20E2

Exhaust Gas Temperature (EGT) Sensor 1-2 Correlation

ECM

DTC P20E2

P2101

Control Module Throttle Actuator Position Performance

PCM

DTC P2101

P2108

Throttle Actuator Control (TAC) Module Performance

PCM

DTC P2108

P2120

Accelerator Pedal Position (APP) Sensor 1 Circuit

PCM

DTC P2120

P2121

Accelerator Pedal Position (APP) Sensor 1 Performance

PCM

DTC P2121

P2122

Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage

ECM
    •  DTC P2122, P2123, P2127, P2128, or P2138 for the 6.6L (LBZ and LLY) engine
    •  DTC P2122, P2123, P2127, P2128, or P2138 for the 6.6L (LMM) engine

P2123

Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage

ECM
    •  DTC P2122, P2123, P2127, P2128, or P2138 for the 6.6L (LBZ and LLY) engine
    •  DTC P2122, P2123, P2127, P2128, or P2138 for the 6.6L (LMM) engine

P2125

Accelerator Pedal Position (APP) Sensor 2 Circuit

PCM

DTC P2125

P2127

Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

ECM
    •  DTC P2122, P2123, P2127, P2128, or P2138 for the 6.6L (LBZ and LLY) engine
    •  DTC P2122, P2123, P2127, P2128, or P2138 for the 6.6L (LMM) engine

P2128

Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage

ECM
    •  DTC P2122, P2123, P2127, P2128, or P2138 for the 6.6L (LBZ and LLY) engine
    •  DTC P2122, P2123, P2127, P2128, or P2138 for the 6.6L (LMM) engine

P2132

Accelerator Pedal Position (APP) Sensor 3 Circuit Low Voltage

ECM

DTC P2122, P2123, P2127, P2128, P2132, P2133, P2138, P2139, or P2140 for the 7.8L (LF8) engine

P2133

Accelerator Pedal Position (APP) Sensor 3 Circuit High Voltage

ECM

DTC P2122, P2123, P2127, P2128, P2132, P2133, P2138, P2139, or P2140 for the 7.8L (LF8) engine

P2135

Throttle Position (TP) Sensor 1-2 Correlation

PCM

DTC P2135

P2138

Accelerator Pedal Position (APP) Sensor 1-2 Correlation

ECM
    •  DTC P2122, P2123, P2127, P2128, or P2138 for the 6.6L (LBZ and LLY) engine
    •  DTC P2122, P2123, P2127, P2128, or P2138 for the 6.6L (LMM) engine

P2139

Accelerator Pedal Position (APP) Sensor 1-3 Correlation

ECM

DTC P2122, P2123, P2127, P2128, P2132, P2133, P2138, P2139, or P2140 for the 7.8L (LF8) engine

P2140

Accelerator Pedal Position (APP) Sensor 2-3 Correlation

ECM

DTC P2122, P2123, P2127, P2128, P2132, P2133, P2138, P2139, or P2140 for the 7.8L (LF8) engine

P2146

Injector Positive Voltage Relay Control Circuit Group 1

ECM
    •  DTC P2146, P2149, P2152, or P2155 for the 6.6L (LBZ and LLY) engine
    •  DTC P2146, P2149, P2152, or P2155 for the 6.6L (LMM) engine
    •  DTC P2146-P2151 for the 7.8L (LF8) engine

P2147

Injector Positive Voltage Control Circuit Group 1 Low Voltage

ECM

DTC P2146-P2151

P2148

Injector Positive Voltage Control Circuit Group 1 High Voltage

ECM

DTC P2146-P2151

P2149

Injector Positive Voltage Relay Control Circuit Group 2

ECM
    •  DTC P2146, P2149, P2152, or P2155 for the 6.6L (LBZ and LLY) engine
    •  DTC P2146, P2149, P2152, or P2155 for the 6.6L (LMM) engine
    •  DTC P2146-P2151 for the 7.8L (LF8) engine

P2150

Injector Positive Voltage Control Circuit Group 2 Low Voltage

ECM

DTC P2146-P2151

P2151

Injector Positive Voltage Control Circuit Group 2 High Voltage

ECM

DTC P2146-P2151

P2152

Injector Positive Voltage Control Circuit Group 3

ECM

DTC P2146, P2149, P2152, or P2155 for the 6.6L (LBZ and LLY) engine

or

DTC P2146, P2149, P2152, or P2155 for the 6.6L (LMM) engine

P2155

Injector Positive Voltage Control Circuit Group 4

ECM

DTC P2146, P2149, P2152, or P2155 for the 6.6L (LBZ and LLY) engine

or

DTC P2146, P2149, P2152, or P2155 for the 6.6L (LMM) engine

P2184

Engine Coolant Temperature (ECT) Sensor 2 Circuit Low Voltage

ECM

DTC P2184 or P2185

P2185

Engine Coolant Temperature (ECT) Sensor 2 Circuit High Voltage

ECM

DTC P2184 or P2185

P2227

Barometric Pressure (BARO) Sensor Performance

ECM

DTC P2227

P2228

Barometric Pressure (BARO) Sensor Circuit Low Voltage

ECM
    •  DTC P2228 or P2229 for the 6.6L (LBZ and LLY) engine
    •  DTC P2228 or P2229 for the 6.6L (LMM) engine
    •  DTC P2228 or P2229 for the 7.8L (LF8) engine

P2229

Barometric Pressure (BARO) Sensor Circuit High Voltage

ECM
    •  DTC P2228 or P2229 for the 6.6L (LBZ and LLY) engine
    •  DTC P2228 or P2229 for the 6.6L (LMM) engine
    •  DTC P2228 or P2229 for the 7.8L (LF8) engine

P2269

Water in Fuel

ECM

DTC P2269

P244B

Diesel Particulate Filter Differential Pressure Too High

ECM

DTC P244B for the 6.6L (LMM) engine

or

DTC P244B for the 6.6L (LMM) engine

P244C

Catalyst Temperature Too Low During Regeneration

ECM

DTC P244C for the 6.6L (LMM) engine

or

DTC P244C for the 7.8L (LF8) engine

P2453

Diesel Particulate Filter Differential Pressure Sensor Performance

ECM

DTC P2453 for the 6.6L (LMM) engine

or

DTC P2453 for the 7.8L (LF8) engine

P2454

Diesel Particulate Filter Differential Pressure Sensor Circuit Low Voltage

ECM

DTC P2454 or P2455 for the 6.6L (LMM) engine

or

DTC P2454 or P2455 for the 7.8L (LF8) engine

P2455

Diesel Particulate Filter Differential Pressure Sensor Circuit High Voltage

ECM

DTC P2454 or P2455 for the 6.6L (LMM) engine

or

DTC P2454 or P2455 for the 7.8L (LF8) engine

P2457

Exhaust Gas Recirculation (EGR) Cooling System Performance

ECM

DTC P2457 for the 7.8L (LF8) engine

P2459

Diesel Particulate Filter Regeneration Frequency (too High)

ECM

DTC P2459

P2463

Diesel Particulate Filter - Soot Accumulation

ECM

DTC P2463 for the 6.6L (LMM) engine

or

DTC P2463 for the 7.8L (LF8) engine

P2510

Engine Control Module Relay Circuit

ECM

DTC P2510 for the 6.6L (LBZ and LLY) engine

or

DTC P2510 for the 6.6L (LMM) engine

P2544

Transmission Torque Request Circuit

ECM

DTC P2544 for the 6.6L (LBZ and LLY) engine

or

DTC P2544 for the 6.6L (LMM) engine

P254D

Power Take-off (PTO) Engine Speed Selector Sensor Circuit High Voltage

ECM

DTC P254D

P2563

Turbocharger Boost Control Position Sensor Performance

ECM
    •  DTC P2563 for the 6.6L (LBZ and LLY) engine
    •  DTC P2563 for the 6.6L (LMM) engine
    •  DTC P2563 for the 7.8L (LF8) engine

P2564

Turbocharger Boost Control Position Sensor Circuit Low Voltage

ECM
    •  DTC P2564 or P2565 for the 6.6L (LBZ and LLY) engine
    •  DTC P2564 or P2565 for the 6.6L (LMM) engine
    •  DTC P2564 for the 7.8L (LG4) engine
    •  DTC P2564 or P2565 for the 7.8L (LF8) engine

P2565

Turbocharger Boost Control Position Sensor Circuit High Voltage

ECM
    •  DTC P2564 or P2565 for the 6.6L (LBZ and LLY) engine
    •  DTC P2564 or P2565 for the 6.6L (LMM) engine
    •  DTC P2565 for the 7.8L (LG4) engine
    •  DTC P2564 or P2565 for the 7.8L (LF8) engine

P2610

Control Module Ignition Off Timer Performance

ECM, PCM
    •  DTC P0602, P0606, P060B, P061C, P062C, P062F, or P2610 for the 6.6L (LMM) engine

P2632

Fuel Pump 2 Relay Control Circuit

ECM

DTC P2632

P2636

Fuel Transfer Pump Flow Insufficient

ECM, PCM

DTC P2636 for the 6.6L (LBZ and LLY) engine

or

DTC P2636 for the 6.6L (LMM) engine

P268A

Fuel Injector Calibration Data Not Programmed

ECM, GPCM

DTC P268A for the 6.6L (LBZ and LLY) engine

or

DTC P268A for the 6.6L (LMM) engine

P268C

Injector 1 Calibration Incorrect

ECM

DTC P268C-P268F or P2690-P2693

P268D

Injector 2 Calibration Incorrect

ECM

DTC P268C-P268F or P2690-P2693

P268E

Injector 3 Calibration Incorrect

ECM

DTC P268C-P268F or P2690-P2693

P268F

Injector 4 Calibration Incorrect

ECM

DTC P268C-P268F or P2690-P2693

P2690

Injector 5 Calibration Incorrect

ECM

DTC P268C-P268F or P2690-P2693

P2691

Injector 6 Calibration Incorrect

ECM

DTC P268C-P268F or P2690-P2693

P2692

Injector 7 Calibration Incorrect

ECM

DTC P268C-P268F or P2690-P2693

P2693

Injector 8 Calibration Incorrect

ECM

DTC P268C-P268F or P2690-P2693

P2900

Turbocharger Boost System Performance

ECM

DTC P2900

P2901

Exhaust Gas Recirculation (EGR) Position Sensor Performance

ECM

DTC P2901

P2902

Exhaust Gas Recirculation (EGR) Open Position Performance

ECM

DTC P2902

P2903

Exhaust Gas Recirculation (EGR) Flow Insufficient

ECM

DTC P2903

P2920

Engine Controls Ignition Relay Feedback Circuit

ECM

DTC P2920

P2921

Fuel Rail Pressure (FRP) Too High

ECM

DTC P2921

P2922

Fuel Rail Pressure (FRP) Too High

ECM

DTC P2922

P2923

Fuel Supply Pump Malfunction

ECM

DTC P2923

U0010

CAN BUS Reset Counter Overrun

TCM

DTC U0010

U0073

Loss of CAN Serial Data Communication

EBCM, ECM, TCM

DTC U0073

U0100

Lost Communications With Engine Control Module (ECM)

TCM

DTC U0100-U0299

U0101

Lost Communications With Transmission Control Module (TCM)

ECM

DTC U0100-U0299

U0105

Lost Communication with Fuel Injection Control Module (FICM)

ECM

DTC U0100-U0299

U0106

Lost Communications With Glow Plug Control Module (GPCM)

ECM

DTC U0100-U0299

U0107

Lost Communication with Throttle Actuator Control (TAC) Module

PCM

DTC U0107

U0115

Lost Communication With ECM/PCM B

TCM

DTC U0100-U0299

U1000

Class 2 Data Link

ECM, EBCM, SDM, IPC, RCDLR, SDGM, TCM, Chime Module

DTC U1000 and U1255

U1016

Lost Communication with ECM/PCM/VCM

Radio, EBCM, SDM, Chime Module

DTC U1001-U1254

U1024

Lost Communication With Transmission Control Module (TCM)

EBCM, IPC,

DTC U1001-U1254

U1031

Lost Communication With Serial Data Gateway (SDG)

SDM, Radio, ECM

DTC U1001-U1254

U1040

Loss of With Electronic Brake Control Module (EBCM)

ESC, IPC, SDM

DTC U1001-U1254

U1088

Lost Communication with Sensing and Diagnostic Module (SDM)

IPC, SDGM

DTC U1001-U1254

U1096

Lost Communication with Instrument Panel Cluster (IPC)

SDM, ECM, SDGM, Chime Module

DTC U1001-U1254

U1111

Lost Communication with Multifunction Alarm Module/Chime Module (MAM)

IPC

DTC U1001-U1254

U1128

Lost Communication with Radio

IPC, SDGM

DTC U1001-U1254

U1176

Lost Communications with Remote Control Door Lock Receiver (RCDLR)

IPC, SDGM

DTC U1001-U1254

U1255

Class 2 Data Link

ECM, EBCM, SDM, IPC, RCDLR, SDGM, TCM

DTC U1000 and U1255

U1300

Class 2 Data Link Low

ECM, SDM, IPC, RCDLR, SDGM, TCM, Chime Module

DTC U1300, U1301, or U1305

U1301

Class 2 Data Link High

ECM, SDM, IPC, RCDLR, SDGM, TCM, Chime Module

DTC U1300, U1301, or U1305

U1305

Class 2 Data Link Low or High

ECM, SDM, RCDLR, SDGM, TCM,

DTC U1300, U1301, or U1305

U1800

Lost Communication with Fuel Injection Control Module (FICM)

ECM

DTC U1800, U2105, U2106, or U2108

U2100

Controller Area Network (CAN) Bus Communication

EBCM, ECM, TCM

DTC U2100

U2104

Controller Area Network (CAN) Bus Reset Counter Overrun

EBCM, ECM, TCM

DTC U2104

U2105

Lost Communications With Engine Control System

EBCM, TCM

DTC U1800, U2105, U2106, or U2108

U2106

Lost Communications With Transmission Control System

EBCM, ECM,

DTC U1800, U2105, U2106, or U2108

U2108

Lost Communications With ABS/TCS Control System

ECM, TCM

DTC U1800, U2105, U2106, or U2108