GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Generic 🢒 1999 🢒 Unit Repair 🢒 Engine 🢒 Engine Controls - 6.5L 🢒 Diagnostic Trouble Code (DTC) List

The service information contained in this manual refers to the Federal calibration package. The export change is NOT reflected in the service information on the DTC's diagnostic support information page or in the Repair Instructions. Export vehicles may have differences in DTC types that will affect Malfunction Indicator Lamp (MIL) operation.

Type A: The PCM illuminates the Malfunction Indicator Lamp (MIL) on the first drive trip that the diagnostic runs and fails.

Type B: The PCM illuminates the Malfunction Indicator Lamp (MIL) on the second consecutive drive trip that the diagnostic runs and fails.

Type C: The PCM will display the Service Throttle Soon on the Message Center only when there is more than one APP DTC stored.

Type C*: The PCM will not illuminate a service lamp but will store a Failure Record on the first drive trip that the diagnostic runs and fails.

If a system is malfunctioning and the associated DTC has been disabled, it may be beneficial to use the diagnostic table as a guide to aid in diagnosis. Many of the DTC tables include a functional check of the system that may pinpoint a problem. However, it is important to remember that the DTC tables are specifically designed for use only when a DTC is set. Therefore, a thorough understanding of the normal operation of the system being diagnosed is necessary and use of the tables for this purpose is at the discretion of the technician.

Important: For Automatic Transmission DTC types.

DTC

Description

RPO L65

P0112

Intake Air Temperature (IAT) Sensor Circuit Low Voltage

B

P0113

Intake Air Temperature (IAT) Sensor Circuit High Voltage

B

P0117

Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage

B

P0118

Engine Coolant Temperature (ECT) Sensor Circuit High Voltage

B

P0126

Insufficient ECT for stable Operation

C

P0182

Fuel Temperature Sensor Circuit Low Voltage

B

P0183

Fuel Temperature Sensor Circuit High Voltage

B

P0215

Engine Shut off Control Circuit

C*

P0216

Injection Timing Control Circuit

B

P0219

Engine Overspeed Condition

C*

P0231

Fuel Pump Feedback Circuit Low Voltage

B

P0232

Fuel Pump Feedback Circuit High Voltage

B

P0234

Turbocharger Over Boost

B

P0236

Turbocharger Boost System

B

P0237

Turbocharger Boost Sensor Circuit Low Voltage

B

P0238

Turbocharger Boost Sensor Circuit High Voltage

B

P0243

Turbocharger Wastegate Solenoid Circuit

B

P0251

Injection Pump Cam System

A

P0300

Engine Misfire Detected

C*

P0301

Cylinder 1 Misfire Detected

C*

P0302

Cylinder 2 Misfire Detected

C*

P0303

Cylinder 3 Misfire Detected

C*

P0304

Cylinder 4 Misfire Detected

C*

P0305

Cylinder 5 Misfire Detected

C*

P0306

Cylinder 6 Misfire Detected

C*

P0307

Cylinder 7 Misfire Detected

C*

P0308

Cylinder 8 Misfire Detected

C*

P0335

Crankshaft Position (CKP) Sensor Circuit

A

P0370

Timing Reference High Resolution

A

P0380

Glow Plug Circuit Performance

B

P0461

Fuel Level Sender Performance

C*

P0462

Fuel Level Sensor Low

C*

P0463

Fuel Level Sensor High

C*

P0475

EPR Solenoid Circuit

B

P0500

Vehicle Speed Sensor Circuit (Manual Transmission only)

C*

P0560

System Voltage

C*

P0562

System Voltage Low

C*

P0563

System Voltage High

C*

P0567

Cruise Resume Circuit

C*

P0568

Cruise Set Circuit

C*

P0601

Internal Control Module Memory

A

P0602

Control Module Programming

A

P0603

PCM Long Term Memory Reset

C*

P0604

Control Module Random Access Memory Check Sum

C*

P0606

PCM Internal Communication Intrerrupted

A

P0621

Generator L-Terminal Circuit

C*

P0650

Malfunction Indicator Lamp (MIL) Control Circuit

C*

P0654

Engine Speed Output Circuit

C*

P0704

Clutch Switch Circuit (Manual Transmission Only

C*

P1125

Accelerator Pedal Position System

C

P1214

Injection Pump Timing Offset

B

P1216

Fuel Solenoid Response Time Too Short

B

P1217

Fuel Solenoid Response Time Too Long

B

P1218

Injection Pump Calibration Circuit

B

P1271

Accelerator Pedal Position (APP) Sensor 1,2 Correlation

C

P1272

Accelerator Pedal Position (APP) Sensor 2,3 Correlation

C

P1273

Accelerator Pedal Position (APP) Sensor 1,3 Correlation

C

P1275

Accelerator Pedal Position (APP) Sensor 1 Circuit

C

P1277

Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage

C

P1278

Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage

C

P1280

Accelerator Pedal Position (APP) Sensor 2 Circuit

C

P1282

Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

C

P1283

Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage

C

P1285

Accelerator Pedal Position (APP) Sensor 3 Circuit

C

P1287

Accelerator Pedal Position (APP) Sensor 3 Circuit Low Voltage

C

P1288

Accelerator Pedal Position (APP) Sensor 3 Circuit High Voltage

C

P1621

PCM Long Term Memory Performance

C*

P1626

Vehicle Theft Deterrent (VTD) Controller Serial Data Circuit

C*

P1631

Theft Deterrent Password Incorrect

C*

P1635

5 Volt Reference (A) Circuit

C*

P1639

5 Volt Reference (B) Circuit

C*

P1646

5 Volt Reference (C) Circuit

C*

P1643

Wait To Start Lamp Control Circuit

B