GM Service Manual Online
For 1990-2009 cars only

This master DTC list includes all applicable DTCs in alphanumeric order with descriptors.

DTC

DTC Descriptor

Module That Sets the DTC

Diagnostic Procedure

B0540

Speedometer Circuit

IPC

DTC B0540 in Instrument Panel, Gages, and Console

B0560

Tachometer Circuit

IPC

DTC B0560 in Instrument Panel, Gages, and Console

B1000

Electronic Control Unit (ECU) Performance

IPC

DTC B1000 in Instrument Panel, Gages, and Console

B1372

Device Ignition 1 (ON and START) Circuit Low

IPC

DTC B1372 in Instrument Panel, Gages, and Console

B1440

Power Mode Master Input Circuits Mismatch

IPC

DTC B1440 in Instrument Panel, Gages, and Console

B2745

Traction Control Switch Circuit

EBCM

DTC B2745 in Antilock Brake System

C0035

Left Front Wheel Speed Sensor Circuit

EBCM

DTC C0035-C0052 in Antilock Brake System

C0052

Right Rear Wheel Speed Sensor Circuit Low

EBCM

DTC C0035-C0052 in Antilock Brake System

C0110

Pump Motor Circuit

EBCM

DTC C0110 in Antilock Brake System

C0163

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

EBCM

DTC C0163 or C0164 in Hydraulic Brakes

C0164

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

EBCM

DTC C0163 or C0164 in Hydraulic Brakes

C0220

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

EBCM

DTC C0220-C0229 in Antilock Brake System

C0221

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

EBCM

DTC C0220-C0229 in Antilock Brake System

C0222

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

EBCM

DTC C0220-C0229 in Antilock Brake System

C0223

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

EBCM

DTC C0220-C0229 in Antilock Brake System

C0224

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

EBCM

DTC C0220-C0229 in Antilock Brake System

C0225

Rear Antilock Brake System (ABS) Channel Motor Free Spins

EBCM

DTC C0220-C0229 in Antilock Brake System

C0226

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

EBCM

DTC C0220-C0229 in Antilock Brake System

C0227

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

EBCM

DTC C0220-C0229 in Antilock Brake System

C0228

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

EBCM

DTC C0220-C0229 in Antilock Brake System

C0229

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

EBCM

DTC C0220-C0229 in Antilock Brake System

C0267

Low Brake Fluid Indicated

EBCM

DTC C0267 in Hydraulic Brakes

C0272

Base Brake Pump Motor Circuit

EBCM

DTC C0272 in Hydraulic Brakes

C0285

Brake Fluid Flow Switch Circuit Low

EBCM

DTC C0285 in Hydraulic Brakes

C0286

Brake Fluid Flow Switch Circuit High

EBCM

DTC C0286 or C086 in Hydraulic Brakes

C0550

Electronic Control Unit (ECU) Performance

EBCM

DTC C0550 in Antilock Brake System

C0899

Device (Single or 1) Voltage Low

EBCM

DTC C0899 in Antilock Brake System

C0900

Device (Single or 1) Voltage High

EBCM

DTC C0900 in Antilock Brake System

P0087

Fuel Rail Pressure (FRP) Too Low

ECM

DTC P0087 in Engine Controls - 7.8L

P0088

Fuel Rail Pressure (FRP) Too High

ECM

DTC P0088 in Engine Controls - 7.8L

P0091

Fuel Pressure Regulator Solenoid 1 Control Circuit Low Voltage

ECM

DTC P0091 in Engine Controls - 7.8L

P0092

Fuel Pressure Regulator Solenoid 1 Control Circuit High Voltage

ECM

DTC P0092 in Engine Controls - 7.8L

P0107

Barometric Pressure (BARO) Sensor Circuit Low Voltage

ECM

DTC P0107 in Engine Controls - 7.8L

P0108

Barometric Pressure (BARO) Sensor Circuit High Voltage

ECM

DTC P0108 in Engine Controls - 7.8L

P0112

Intake Air Temperature (IAT) Sensor Circuit Low Voltage

ECM

DTC P0112 in Engine Controls - 7.8L

P0113

Intake Air Temperature (IAT) Sensor Circuit High Voltage

ECM

DTC P0113 in Engine Controls - 7.8L

P0117

Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage

ECM

DTC P0117 in Engine Controls - 7.8L

P0118

Engine Coolant Temperature (ECT) Sensor Circuit High Voltage

ECM

DTC P0118 in Engine Controls - 7.8L

P0182

Fuel Temperature Sensor Circuit Low Voltage

ECM

DTC P0182 in Engine Controls - 7.8L

P0183

Fuel Temperature Sensor Circuit High Voltage

ECM

DTC P0183 in Engine Controls - 7.8L

P0192

Fuel Rail Pressure (FRP) Sensor Circuit Low Voltage

ECM

DTC P0192 in Engine Controls - 7.8L

P0193

Fuel Rail Pressure (FRP) Sensor Circuit High Voltage

ECM

DTC P0193 in Engine Controls - 7.8L

P0201

Injector 1 Control Circuit

ECM

DTC P0201, P0202, P0203, P0204, P0205, or P0206 in Engine Controls - 7.8L

P0202

Injector 2 Control Circuit

ECM

DTC P0201, P0202, P0203, P0204, P0205, or P0206 in Engine Controls - 7.8L

P0203

Injector 3 Control Circuit

ECM

DTC P0201, P0202, P0203, P0204, P0205, or P0206 in Engine Controls - 7.8L

P0204

Injector 4 Control Circuit

ECM

DTC P0201, P0202, P0203, P0204, P0205, or P0206 in Engine Controls - 7.8L

P0205

Injector 5 Control Circuit

ECM

DTC P0201, P0202, P0203, P0204, P0205, or P0206 in Engine Controls - 7.8L

P0206

Injector 6 Control Circuit

ECM

DTC P0201, P0202, P0203, P0204, P0205, or P0206 in Engine Controls - 7.8L

P0219

Engine Overspeed

ECM

DTC P0219 in Engine Controls - 7.8L

P0234

Engine Overboost

ECM

DTC P0234 in Engine Controls - 7.8L

P0237

Turbocharger Boost Sensor Circuit Low Voltage

ECM

DTC P0237 in Engine Controls - 7.8L

P0238

Turbocharger Boost Sensor Circuit High Voltage

ECM

DTC P0238 in Engine Controls - 7.8L

P0335

Crankshaft Position (CKP) Sensor Circuit

ECM

DTC P0335 in Engine Controls - 7.8L

P0381

Wait to Start Lamp Control Circuit

ECM

DTC P0381 in Instrument Panel, Gages and Console

P0382

Glow Plug Controller Command Circuit Fault

ECM

DTC P0382 in Engine Controls - 7.8L

P0385

Crankshaft Position (CKP) Sensor B Circuit

ECM

DTC P0385 in Engine Controls - 7.8L

P0461

Fuel Level Sensor 1 Performance

ECM

DTC P0461 in Instrument Panel, Gages, and Console

P0462

Fuel Level Sensor 1 Circuit Low Voltage

ECM

DTC P0462 in Instrument Panel, Gages, and Console

P0463

Fuel Level Sensor 1 Circuit High Voltage

ECM

DTC P0463 in Instrument Panel, Gages, and Console

P0512

Starter Switch Circuit

ECM

DTC P0512 in Engine Electrical

P0522

Engine Oil Pressure (EOP) Sensor Circuit Low Voltage

ECM

DTC P0522 in Instrument Panel, Gages, and Console

P0523

Engine Oil Pressure (EOP) Sensor Circuit High Voltage

ECM

DTC P0523 in Instrument Panel, Gages, and Console

P0562

System Voltage Low

ECM

DTC P0562 in Engine Electrical

P0563

System Voltage High

ECM

DTC P0563 in Engine Electrical

P0567

Cruise Control Resume Switch Circuit

ECM

DTC P0567 in Cruise Control

P0568

Cruise Control Set Switch Circuit

ECM

DTC P0568 in Cruise Control

P0602

Control Module Not Programmed

ECM

DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 in Engine Controls - 7.8L

P0606

Control Module Internal Performance

ECM

DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 in Engine Controls - 7.8L

P0608

Vehicle Speed Output Circuit

ECM

DTC P0608 in Instrument Panel, Gages, and Console

P0621

Generator L-Terminal Circuit

ECM

DTC P0621 in Engine Electrical

P0622

Generator F-Terminal Circuit

ECM

DTC P0622 in Engine Electrical

P0641

5-Volt Reference 1 Circuit

ECM

DTC P0641 in Engine Controls - 7.8L

P0651

5-Volt Reference 2 Circuit

ECM

DTC P0651 in Engine Controls - 7.8L

P0654

Engine Speed Output Circuit

ECM

DTC P0654 in Instrument Panel, Gages, and Console

P1087

Fuel Rail Pressure (FRP) Trim Too Low

ECM

DTC P1087 in Engine Controls - 7.8L

P1088

Fuel Rail Pressure (FRP) Trim Too High

ECM

DTC P1088 in Engine Controls - 7.8L

P1125

Accelerator Pedal Position (APP) System

ECM

DTC P1125 in Engine Controls - 7.8L

P1261

Injector Positive Voltage Control Circuit

ECM

DTC P1261 in Engine Controls - 7.8L

P1263

Injector Positive Voltage Control Circuit Group 1 Low Voltage

ECM

DTC P1263 in Engine Controls - 7.8L

P1264

Injector Positive Voltage Control Circuit Group 1 High Voltage

ECM

DTC P1264 in Engine Controls - 7.8L

P1265

Injector Positive Voltage Control Circuit Group 2 Low Voltage

ECM

DTC P1265 in Engine Controls - 7.8L

P1266

Injector Positive Voltage Control Circuit Group 2 High Voltage

ECM

DTC P1266 in Engine Controls - 7.8L

P1271

Accelerator Pedal Position (APP) Sensor 1-2 Correlation

ECM

DTC P1271 in Engine Controls - 7.8L

P1272

Accelerator Pedal Position (APP) Sensor 2-3 Correlation

ECM

DTC P1272 in Engine Controls - 7.8L

P1273

Accelerator Pedal Position (APP) Sensor 1-3 Correlation

ECM

DTC P1273 in Engine Controls - 7.8L

P1277

Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage

ECM

DTC P1277 in Engine Controls - 7.8L

P1278

Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage

ECM

DTC P1278 in Engine Controls - 7.8L

P1282

Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

ECM

DTC P1282 in Engine Controls - 7.8L

P1283

Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage

ECM

DTC P1283 in Engine Controls - 7.8L

P1287

Accelerator Pedal Position (APP) Sensor 3 Circuit Low Voltage

ECM

DTC P1287 in Engine Controls - 7.8L

P1288

Accelerator Pedal Position (APP) Sensor 3 Circuit High Voltage

ECM

DTC P1288 in Engine Controls - 7.8L

P1431

Fuel Level Sensor 2 Performance

ECM, PCM

DTC P1431

P1432

Fuel Level Sensor 2 Circuit Low Voltage

ECM, PCM

DTC P1432

P1433

Fuel Level Sensor 2 Circuit High Voltage

ECM, PCM

DTC P1433

P1621

Control Module Long Term Memory Performance

ECM

DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 in Engine Controls - 7.8L

P1646

5-Volt Reference 3 Circuit

ECM

DTC P1646 in Engine Controls - 7.8L

P2003

Mass Air Flow (MAF) Sensor Circuit High Voltage

ECM

DTC P2003 in Engine Controls - 7.8L

P2004

Mass Air Flow (MAF) Sensor Circuit Low Voltage

ECM

DTC P2004 in Engine Controls - 7.8L

P2005

Power Take Off (PTO) Sensor Circuit High Voltage

ECM

DTC P2005 in Engine Controls - 7.8L

P2007

Turbocharger Boost Control Solenoid Control Circuit High Voltage

ECM

DTC P2007 in Engine Controls - 7.8L

P2008

Turbocharger Boost Control Solenoid Control Circuit Low Voltage

ECM

DTC P2008 in Engine Controls - 7.8L

P2011

Injector Positive Voltage Control Circuit Group 3

ECM

DTC P2011 in Engine Controls - 7.8L

P2012

Injector Positive Voltage Control Circuit Group 4

ECM

DTC P2012 in Engine Controls - 7.8L

P2066

Fuel Level Sensor 2 Performance

ECM

DTC P2066 in Instrument Panel, Gages, and Console

P2067

Fuel Level Sensor 2 Circuit Low Voltage

ECM

DTC P2067 in Instrument Panel, Gages, and Console

P2068

Fuel Level Sensor 2 Circuit High Voltage

ECM

DTC P2068 in Instrument Panel, Gages, and Console

P2564

Turbocharger Boost Control Position Sensor Circuit Low Voltage

ECM

DTC P2564 in Engine Controls - 7.8L

P2565

Turbocharger Boost Control Position Sensor Circuit High Voltage

ECM

DTC P2565 in Engine Controls - 7.8L

P2900

Turbocharger Boost Control System Performance

ECM

DTC P2900 in Engine Controls - 7.8L

P2901

Exhaust Gas Recirculation (EGR) Position Sensor Performance

ECM

DTC P2901 in Engine Controls - 7.8L

P2902

Exhaust Gas Recirculation (EGR) Open Position Performance

ECM

DTC P2902 in Engine Controls - 7.8L

P2903

Exhaust Gas Recirculation (EGR) Flow Insufficient

ECM

DTC P2903 in Engine Controls - 7.8L

P2920

Engine Controls Ignition Relay Feedback Circuit

ECM

DTC P2920 in Engine Controls - 7.8L

P2921

Fuel Rail Pressure (FRP) Too High

ECM

DTC P2921 in Engine Controls - 7.8L

P2922

Fuel Rail Pressure (FRP) Too High

ECM

DTC P2922 in Engine Controls - 7.8L

P2923

Fuel Rail Pressure Low During Power Enrichment

ECM

DTC P2923 in Engine Controls - 7.8L

U1000

Class 2 Data Link

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

DTC U1000 and U1255 in Computer/Integrating Systems

U1016

Lost Communications With Engine Control Module (ECM)

EBCM, IPC, Chime Module

DTC U1001-U1254 in Computer/Integrating Systems

U1024

Lost Communications With Transmission Control Module (TCM)

ECM, IPC

DTC U1001-U1254 in Computer/Integrating Systems

U1031

Lost Communications With Serial Data Gateway Module (SDGM)

ECM

DTC U1001-U1254 in Computer/Integrating Systems

U1040

Lost Communications With Electronic Brake Control Module (EBCM)

ECM, IPC

DTC U1001-U1254 in Computer/Integrating Systems

U1096

Lost Communications With Instrument Panel Cluster (IPC)

ECM, SDGM, Chime Module

DTC U1001-U1254 in Computer/Integrating Systems

U1111

Lost Communications With Multifunction Alarm Module (MAM)/Chime Module

IPC

DTC U1001-U1254 in Computer/Integrating Systems

U1176

Lost Communications With Remote Control Door Lock Receiver (RCDLR)

IPC, SDGM

DTC U1001-U1254 in Computer/Integrating Systems

U1255

Lost Communications

ECM, EBCM, IPC, RCDLR, SDGM, TCM

DTC U1000 and U1255 in Computer/Integrating Systems

U1300

Class 2 Data Link Low

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

DTC U1300, U1301, or U1305 in Computer/Integrating Systems

U1301

Class 2 Data Link High

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

DTC U1300, U1301, or U1305 in Computer/Integrating Systems

U1305

Class 2 Data Link Low or High

EBCM, RCDLR, SDGM, TCM

DTC U1300, U1301, or U1305 in Computer/Integrating Systems

U2104

Controller Area Network (CAN) Bus Reset Counter Overrun

EBCM, ECM, FICM, TCM

DTC U2104 in Computer/Integrating Systems

U2106

Lost Communications With Transmission Control System

EBCM, ECM, FICM

DTC U2106 in Computer/Integrating Systems

U2108

Lost Communications With ABS/TCS Control System

ECM, FICM, TCM

DTC U2108 in Computer/Integrating Systems