Safety Warning
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 MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM & FUEL SYSTEM - 6.6L (LMM) - INTRODUCTION (2 OF 2)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC CODE INDEX
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Diagnostic Code Index
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Diagnostic Code Index
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC P0016 | P0016: Crankshaft Position (CKP) Camshaft Position (CMP) Correlation. |
| DTC P003A | P003A: Turbocharger Boost Control Position Not Learned |
| DTC P0047 or P0048 | P0047: Turbocharger Boost Control Solenoid Control Circuit Low Voltage P0048: Turbocharger Boost Control Solenoid Control Circuit High Voltage |
| DTC P0087 or P0088 | P0087: Fuel Rail Pressure (FRP) Too Low P0088: Fuel Rail Pressure (FRP) Too High |
| DTC P0090 | P0090: Fuel Pressure Regulator Control Circuit |
| DTC P0097 or P0098 | P0097: Intake Air Temperature (IAT) Sensor 2 Circuit Low Voltage P0098: Intake Air Temperature (IAT) Sensor 2 Circuit High Voltage |
| DTC P009E | P009E: Fuel Rail Pressure Relief Valve Performance |
| DTC P0101 | P0101: Mass Air Flow (MAF) Sensor Performance |
| DTC P0102 or P0103 | P0102: Mass Air Flow (MAF) Sensor Circuit Low Voltage P0103: Mass Air Flow (MAF) Sensor Circuit High Voltage |
| DTC P0106 | P0106: Manifold Absolute Pressure (MAP) Sensor Performance |
| DTC P0107 or P0108 | P0107: Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage P0108: Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage |
| DTC P0112 or P0113 | P0112: Intake Air Temperature (IAT) Sensor Circuit Low Voltage P0113: Intake Air Temperature (IAT) Sensor Circuit High Voltage |
| DTC P0116 | P0116: Engine Coolant Temperature (ECT) Sensor Performance |
| DTC P0117 or P0118 | P0117: Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage P0118: Engine Coolant Temperature (ECT) Sensor Circuit High Voltage |
| DTC P0128 | P0128: Engine Coolant Temperature (ECT) Below Thermostat Temperature |
| DTC P0168 | P0168: Engine Fuel Over-Temperature |
| DTC P0181 | P0181: Fuel Temperature Sensor Performance |
| DTC P0182 or P0183 | P0182: Fuel Temperature Sensor Circuit Low Voltage P0183: Fuel Temperature Sensor Circuit High Voltage |
| DTC P0191 | P0191: Fuel Rail Pressure (FRP) Sensor Performance |
| DTC P0192 or P0193 | P0192: Fuel Rail Pressure (FRP) Sensor Circuit Low Voltage P0193: Fuel Rail Pressure (FRP) Sensor Circuit High Voltage |
| DTC P0201, P0202, P0203, P0204, P0205, P0206, P0207, or P0208 | P0201: Fuel Injector 1 Control Circuit P0202: Fuel Injector 2 Control Circuit P0203: Fuel Injector 3 Control Circuit P0204: Fuel Injector 4 Control Circuit P0205: Fuel Injector 5 Control Circuit P0206: Fuel Injector 6 Control Circuit P0207: Fuel Injector 7 Control Circuit P0208: Fuel Injector 8 Control Circuit |
| DTC P0230 | P0230: Fuel Pump Relay Control Circuit |
| DTC P0234 | P0234: Turbocharger Engine Overboost |
| DTC P0299 | P0299: Turbocharger Engine Underboost |
| DTC P029D, P02A1, P02A5, P02A9, P02AD, P02B1, P02B5, or P02B9 | P029D: Injector 1 Leak P02A1: Injector 2 Leak P02A5: Injector 3 Leak P02A9: Injector 4 Leak P02AD: Injector 5 Leak P02B1: Injector 6 Leak P02B5: Injector 7 Leak P02B9: Injector 8 Leak |
| DTC P02E0 | P02E0: Diesel Intake Air (IA) Flow Control Circuit |
| DTC P02E7 | P02E7: Diesel Intake Air (IA) Flow Position Sensor Performance |
| DTC P02E8 or P02E9 | P02E8: Diesel Intake Air (IA) Flow Position Sensor Circuit Low Voltage P02E9: Diesel Intake Air (IA) Flow Position Sensor Circuit High Voltage |
| DTC P0300-P0308 | P0300: Engine Misfire Detected P0301: Cylinder 1 Misfire Detected P0302: Cylinder 2 Misfire Detected P0303: Cylinder 3 Misfire Detected P0304: Cylinder 4 Misfire Detected P0305: Cylinder 5 Misfire Detected P0306: Cylinder 6 Misfire Detected P0307: Cylinder 7 Misfire Detected P0308: Cylinder 8 Misfire Detected |
| DTC P0335 | P0335: Crankshaft Position (CKP) Sensor Circuit |
| DTC P0336 | P0336: Crankshaft Position (CKP) Sensor Performance |
| DTC P0340 | P0340: Camshaft Position (CMP) Sensor Circuit |
| DTC P0341 | P0341: Camshaft Position (CMP) Sensor Performance |
| DTC P0401 or P0402 | P0401: Exhaust Gas Recirculation (EGR) Flow Insufficient P0402: Exhaust Gas Recirculation (EGR) Flow Excessive |
| DTC P0403 or P046C | P0403: Exhaust Gas Recirculation (EGR) Solenoid Control Circuit P046C: Exhaust Gas Recirculation (EGR) Position Sensor Performance |
| DTC P0405 or P0406 | P0405: Exhaust Gas Recirculation (EGR) Position Sensor Circuit Low Voltage P0406: Exhaust Gas Recirculation (EGR) Position Sensor Circuit High Voltage |
| DTC P040C or P040D | P040C: Exhaust Gas Recirculation (EGR) Temperature Sensor 1 Circuit Low Voltage P040D: Exhaust Gas Recirculation (EGR) Temperature Sensor 1 Circuit High Voltage |
| DTC P040F | P040F: Exhaust Gas Recirculation (EGR) Temperature Sensor 1-2 Correlation |
| DTC P041C or P041D | P041C: Exhaust Gas Recirculation (EGR) Temperature Sensor 2 Circuit Low Voltage P041D: Exhaust Gas Recirculation (EGR) Temperature Sensor 2 Circuit High Voltage |
| DTC P0420 | P0420: Catalyst System Low Efficiency |
| DTC P0506 or P0507 | P0506: Idle Speed Low P0507: Idle Speed High |
| DTC P0545 or P0546 | P0545: Exhaust Temperature Sensor 1 (EGT-1) Circuit Low Voltage P0546: Exhaust Temperature Sensor 1 (EGT-1) Circuit High Voltage |
| DTC P0602, P0606, P060B, P061C, P062C, P062F, or P2610 | P0602: Control Module Not Programmed P0606: Control Module Internal Performance P060B: Control Module Analog to Digital Performance P061C: Control Module Engine Speed Performance P062C: Control Module Vehicle Speed Performance P062F: Control Module Long Term Memory Performance P2610: Control Module Ignition Off Timer Performance |
| DTC P0640 | P0640: Intake Air (IA) Heater Control Circuit |
| DTC P0642 or P0643 | P0642: 5-Volt Reference 1 Circuit Low Voltage P0643: 5-Volt Reference 1 Circuit High Voltage |
| DTC P064C | P064C: Glow Plug Module Control Performance |
| DTC P0650 | P0650: Malfunction Indicator Lamp (MIL) Control Circuit |
| DTC P0652 or P0653 | P0652: 5 Volt Reference 2 Circuit Low Voltage P0653: 5 Volt Reference 2 Circuit High Voltage |
| DTC P0671-P0678 | P0671: Cylinder #1 Glow Plug Control Circuit P0672: Cylinder #2 Glow Plug Control Circuit P0673: Cylinder #3 Glow Plug Control Circuit P0674: Cylinder #4 Glow Plug Control Circuit P0675: Cylinder #5 Glow Plug Control Circuit P0676: Cylinder #6 Glow Plug Control Circuit P0677: Cylinder #7 Glow Plug Control Circuit P0678: Cylinder #8 Glow Plug Control Circuit |
| DTC P0698 or P0699 | P0698: 5-Volt Reference 3 Circuit Low Voltage P0699: 5-Volt Reference 3 Circuit High Voltage |
| DTC P0700 | P0700: Transmission Control Module (TCM) Requested MIL Illumination |
| DTC P1224, P1227, P122A, P1233, P1236, P1239, P1242, or P1247 | P1224: Fuel Injector 1 Control Circuit Shorted P1227: Fuel Injector 2 Control Circuit Shorted P122A: Fuel Injector 3 Control Circuit Shorted P1233: Fuel Injector 4 Control Circuit Shorted P1236: Fuel Injector 5 Control Circuit Shorted P1239: Fuel Injector 6 Control Circuit Shorted P1242: Fuel Injector 7 Control Circuit Shorted P1247: Fuel Injector 8 Control Circuit Shorted |
| DTC P1448 | P1448: Diesel Particulate Filter Regeneration Frequency Too Low |
| DTC P150C | P150C: Transmission Control Module (TCM) Engine Speed Request Circuit |
| DTC P154A | P154A: Intake Air (IA) Heater Feedback Circuit |
| DTC P154B | P154B: Intake Air (IA) Heater Voltage Signal Circuit |
| DTC P154C | P154C: Intake Air (IA) Heater Current Signal Circuit. |
| DTC P154D | P154D: Intake Air (IA) Heater Temperature Signal Circuit. |
| DTC P160C | P160C: Engine Calibration Information Not Programmed-GPCM |
| DTC P166B | P166B: Intake Air (IA) Heater Over Temperature |
| DTC P166C | P166C: Intake Air (IA) Heater Resistance. |
| DTC P2002 | P2002: Diesel Particulate Filter Efficiency |
| DTC P2032 or P2033 | P2032: Exhaust Temperature Sensor 2 (EGT-2) Circuit Low Voltage P2033: Exhaust Temperature Sensor 2 (EGT-2) Circuit High Voltage |
| DTC P20E2 | 20E2: Exhaust Temperature Sensor 1-2 Correlation |
| DTC P2122, P2123, P2127, P2128, or P2138 | P2122: Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage P2123: Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage P2127: Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage P2128: Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage P2138: Accelerator Pedal Position (APP) Sensor 1-2 Correlation |
| DTC P2146, P2149, P2152, or P2155 | 2146: Injector Positive Voltage Control Circuit Group 1 2149: Injector Positive Voltage Control Circuit Group 2 2152: Injector Positive Voltage Control Circuit Group 3 2155: Injector Positive Voltage Control Circuit Group 4 |
| DTC P2228 or P2229 | P2228: Barometric Pressure (BARO) Sensor Circuit Low Voltage P2229: Barometric Pressure (BARO) Sensor Circuit High Voltage |
| DTC P2266 | P2266: Water in Fuel Sensor Circuit Low Voltage |
| DTC P2269 | P2269: Water in Fuel |
| DTC P244B | P244B: Diesel Particulate Filter Differential Pressure Too High |
| DTC P244C | P244C: Catalyst Temperature Too Low During Regeneration |
| DTC P2453 | P2453: Particulate Matter Trap Differential Pressure Sensor Signal Performance |
| DTC P2454 or P2455 | 2454: Diesel Particulate Filter Differential Pressure Sensor Circuit Low Voltage 2455: Diesel Particulate Filter Differential Pressure Sensor Circuit High Voltage |
| DTC P2459 | P2459: Diesel Particulate Filter Regeneration Too Often |
| DTC P2463 | P2463: Diesel Particulate Filter Soot Level Accumulation |
| DTC P2510 | P2510: Engine Control Module Relay Circuit |
| DTC P2544 | P2544: Transmission Torque Request Circuit |
| DTC P2563 | P2563: Turbocharger Boost Control Position Sensor Performance |
| DTC P2564 or P2565 | P2564: Turbocharger Boost Control Position Sensor Circuit Low Voltage P2565: Turbocharger Boost Control Position Sensor Circuit High Voltage |
| DTC P268A | P268A: Fuel Injector Calibration Data Not Programmed |
| DTC P268C, P268D, P268E, P268F, P2690, P2691, or P2693 | P268C: Injector 1 Calibration Incorrect P268D: Injector 2 Calibration Incorrect P268E: Injector 3 Calibration Incorrect P268F: Injector 4 Calibration Incorrect P2690: Injector 5 Calibration Incorrect P2691: Injector 6 Calibration Incorrect P2692: Injector 7 Calibration Incorrect P2693: Injector 8 Calibration Incorrect |
RENDER: 1.0x
NO RELATED
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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.