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DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1997CHEVY EXPRESS G3500, VAN CARGO, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 61 (ENGINE CONTROLS - TESTS W/CODES - 6.5L DIESEL (P SERIES))SELF-DIAGNOSTIC SYSTEMTROUBLE CODE IDENTIFICATION
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 F
Trouble Code Identification
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 FSECTION Trouble Code Identification
WARNING: This page is about a different car, the 1997 GMC Vandura, 1997 GMC Forward Control, 1997 Chevrolet Forward Control, and 1997 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Trouble codes retrieved from PCM may be either engine or transmission related. Only engine related DTCs are covered in this article. For transmission related DTCs, see the AUTO TRANS DIAGNOSIS article in the AUTOMATIC TRANSMISSION section. See DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION table to determine if DTC is engine or transmission related.
- The DTCs indicate failure of a specific sensor and/or circuit. Sensor/circuit diagnosis may indicate replacement of PCM.
- If PCM is replaced at any point during diagnostic testing and if condition is still not corrected after replacing PCM, the following may be the cause:
- An incorrect PCM may cause a malfunction, which may or may not set a DTC.
- The PCM connector may be the problem. Connector terminals may have to be removed from connector to be properly checked.
- Replacement PCM may be faulty.
- Intermittent problem. Make a careful physical inspection of affected sensor/circuit.
- A shorted solenoid, coil relay, or harness may be the cause of PCM failure. Use Short Circuit Tester (J-34636) to check for short circuits.
DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Probable Cause | ||||
|---|---|---|---|---|---|
| P0112 (1) | IAT Sensor Circuit Low Voltage | ||||
| P0113 (1) | IAT Sensor Circuit High Voltage | ||||
| P0117 (1) | ECT Sensor Circuit Low Voltage | ||||
| P0118 (1) | ECT Sensor Circuit High Voltage | ||||
| P0121 (1) | APP Sensor 1 Circuit Performance | ||||
| P0122 (1) | APP Sensor 1 Circuit Low Voltage | ||||
| P0123 (1) | APP Sensor 1 Circuit High Voltage | ||||
| P0182 (1) | Fuel Temperature Sensor Circuit Low Voltage | ||||
| P0183 (1) | Fuel Temperature Sensor Circuit High Voltage | ||||
| P0215 (1) | Engine Shutoff Solenoid Control Circuit | ||||
| P0216 (1) | Injection Timing Control System | ||||
| P0218 (2) | Transmission Fluid Overtemperature | ||||
| P0219 (1) | Engine Overspeed Condition | ||||
| P0220 (1) | APP Sensor 2 Circuit | ||||
| P0221 (1) | APP Sensor 2 Circuit Performance | ||||
| P0222 (1) | APP Sensor 2 Circuit Low Voltage | ||||
| P0223 (1) | APP Sensor 2 Circuit High Voltage | ||||
| P0225 (1) | APP Sensor 3 Circuit | ||||
| P0226 (1) | APP Sensor 3 Circuit Performance | ||||
| P0227 (1) | APP Sensor 3 Circuit Low Voltage | ||||
| P0228 (1) | APP Sensor 3 Circuit High Voltage | ||||
| P0231 (1) | Fuel/Lift Pump Feedback Circuit Low Voltage | ||||
| P0236 (1) | Turbocharger Boost System | ||||
| P0237 (1) | Turbocharger Boost Sensor Circuit Low Voltage | ||||
| P0238 (1) | Turbocharger Boost Sensor Circuit High Voltage | ||||
| P0251 (1) | Injection Pump Cam System | ||||
| P0263 (1) | Cylinder No. 1 Balance System | ||||
| P0266 (1) | Cylinder No. 2 Balance System | ||||
| P0269 (1) | Cylinder No. 3 Balance System | ||||
| P0272 (1) | Cylinder No. 4 Balance System | ||||
| P0275 (1) | Cylinder No. 5 Balance System | ||||
| P0278 (1) | Cylinder No. 6 Balance System | ||||
| P0281 (1) | Cylinder No. 7 Balance System | ||||
| P0284 (1) | Cylinder No. 8 Balance System | ||||
| P0335 (1) | CKP Sensor Circuit Performance | ||||
| P0370 (1) | Timing Reference High Resolution | ||||
| P0380 (1) | Glow Plug Circuit Performance | ||||
| P0501 (1) | Vehicle Speed Sensor Circuit | ||||
| P0560 (2) | System Voltage Malfunction | ||||
| P0601 (1) | PCM Memory | ||||
| P0602 (1) | PCM Not Programmed | ||||
| P0606 (1) | PCM Internal Communication Interrupted | ||||
| P0711 (2) | TFT Sensor Circuit - Range/Performance | ||||
| P0712 (2) | TFT Sensor Circuit - Low Input | ||||
| P0713 (2) | TFT Sensor Circuit - High Input | ||||
| P0716 (2) | Input Speed Sensor Circuit - Range/Performance | ||||
| P0717 (2) | Input Speed Sensor Circuit - No Signal | ||||
| P0719 (2) | Brake Switch Circuit - Low Input | ||||
| P0722 (2) | Output Speed Sensor - Low Input | ||||
| P0723 (2) | Output Speed Sensor - Intermittent | ||||
| P0724 (2) | Brake Switch Circuit - High Input | ||||
| P0741 (2) | TCC Stuck Off | ||||
| P0742 (2) | TCC Stuck On | ||||
| P0748 (2) | PCS Circuit - Electrical | ||||
| P0751 (2) | 1-2 Shift Solenoid - Performance | ||||
| P0753 (2) | 1-2 Shift Solenoid - Electrical | ||||
| P0756 (2) | 2-3 Shift Solenoid - Performance | ||||
| P0758 (2) | 2-3 Shift Solenoid - Electrical | ||||
| P1125 (1) | APP System | ||||
| P1214 (1) | Injection Pump Timing Offset Error | ||||
| P1216 (1) | Fuel Solenoid Response Time Too Short | ||||
| P1217 (1) | Fuel Solenoid Response Time Too Long | ||||
| P1218 (1) | Injection Pump Calibration Circuit | ||||
| P1627 (1) | A/D Performance | ||||
| P1635 (1) | PCM 5-Volt Reference Low | ||||
| P1641 (1) | MIL Control Circuit | ||||
| P1654 (1) | Service Throttle Soon Light Control Circuit | ||||
| P1656 (1) | Wastegate Solenoid Control Circuit | ||||
| P1810 (2) | Fluid Press. Manual Valve Position Switch | ||||
| P1860 (2) | TCC PWM Solenoid Circuit - Electrical | ||||
| P1870 (2) | Transmission Component Slipping | ||||
| P1871 (2) | Undefined Gear Ratio | ||||
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.