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.
2004 Hummer H2 4D Utility PickupFACTORY OEM SERVICE PROCEDURE
Engine Performance 6.0L DTCS
ENGINE PERFORMANCE 6.0L DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Definition |
|---|---|
| DTC P0068 | Throttle Body Air Flow Performance |
| DTC P0101 (With Throttle Actuator Control) | Mass Air Flow (MAF) Sensor Performance |
| DTC P0102 | Mass Air Flow (MAF) Sensor Circuit Low Frequency |
| DTC P0103 | Mass Air Flow (MAF) Sensor Circuit High Frequency |
| DTC P0106 (With Throttle Actuator Control) | Manifold Absolute Pressure (MAP) Sensor Performance |
| DTC P0107 | Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage |
| DTC P0108 | Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage |
| DTC P0112 | Intake Air Temperature (IAT) Sensor Circuit Low Voltage |
| DTC P0113 | Intake Air Temperature (IAT) Sensor Circuit High Voltage |
| DTC P0116 | Engine Coolant Temperature (ECT) Sensor Performance |
| DTC P0117 | Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage |
| DTC P0118 | Engine Coolant Temperature (ECT) Sensor Circuit High Voltage |
| DTC P0120 | Throttle Position (TP) Sensor 1 Circuit |
| DTC P0125 | TP Sensor |
| DTC P0128 | Engine Coolant Temperature (ECT) Below Thermostat Regulating Temperature |
| DTC P0131 or P0151 | HO2S Circuit Low Voltage Bank 1/2 Sensor 1 |
| DTC P0132 or P0152 | HO2S Circuit High Voltage Bank 1/2 Sensor 1 |
| DTC P0133 or P0153 | HO2S Slow Response Bank 1/2 Sensor 1 |
| DTC P0134 or P0154 | HO2S Circuit Insufficient Activity Bank 1/2 Sensor 1 |
| DTC P0135 or P0155 | HO2S Heater Performance Bank 1/2 Sensor 1 |
| DTC P0136 or P0156 | |
| DTC P0137 or P0157 | HO2S Circuit Low Voltage Bank 1/2 Sensor 2 |
| DTC P0138 or P0158 | HO2S Circuit High Voltage Bank 1/2 Sensor 2 |
| DTC P0140 or P0160 | HO2S Circuit Insufficient Activity Bank 1/2 Sensor 2 |
| DTC P0141 or P0161 | HO2S Heater Performance Bank 1/2 Sensor 2 |
| DTC P0171 or P0174 | Fuel Trim System Lean Bank 1/2 |
| DTC P0172 or P0175 | Fuel Trim System Rich Bank 1/2 |
| DTC P0200 | Injector Control Circuit |
| DTC P0220 | Throttle Position (TP) Sensor 2 Circuit |
| DTC P0230 | Fuel Pump Relay Control Circuit |
| DTC P0300 | Engine Misfire Detected |
| DTC P0315 | Crankshaft Position (CKP) System Variation Not Learned |
| DTC P0325 | Knock Sensor (KS) 1 Circuit |
| DTC P0327 or P0332 | Knock Sensor (KS) 1/2 Circuit Low Frequency |
| DTC P0335 | Crankshaft Position (CKP) Sensor Circuit |
| DTC P0336 | Crankshaft Position (CKP) Sensor Performance |
| DTC P0341 | Camshaft Position (CMP) Sensor Performance |
| DTC P0342 | Camshaft Position (CMP) Sensor Circuit Low Voltage |
| DTC P0343 | Camshaft Position (CMP) Sensor Circuit High Voltage |
| DTC P0351, P0352, P0353, P0354, P0355, P0356, P0357, P0358 | Ignition Coil Control Circuit |
| DTC P0420 or P0430 | Catalyst System Low Efficiency Bank 1 |
| DTC P0442 | Catalyst System Low Efficiency Bank 2 |
| DTC P0443 | Evaporative Emission (EVAP) Purge Solenoid Control Circuit |
| DTC P0446 | Evaporative Emission (EVAP) Vent System Performance |
| DTC P0449 | Evaporative Emission (EVAP) Vent Solenoid Control Circuit |
| DTC P0452 | Fuel Tank Pressure (FTP) Sensor Circuit Low Voltage |
| DTC P0453 | Fuel Tank Pressure (FTP) Sensor Circuit High Voltage |
| DTC P0455 | Evaporative Emission (EVAP) System |
| DTC P0496 | Evaporative Emission (EVAP) System Flow During Non-Purge |
| DTC P0506 (TAC) | Idle Speed Low |
| DTC P0507 (TAC) | Idle Speed High |
| DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 | Control Module |
| DTC P0641 | 5-Volt Reference 1 Circuit |
| DTC P0650 | Malfunction Indicator Lamp (MIL) Control Circuit |
| DTC P0651 | 5-Volt Reference 2 Circuit |
| DTC P1106 | Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage |
| DTC P1107 | Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low Voltage |
| DTC P1111 | Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage |
| DTC P1112 | Intake Air Temperature (IAT) Sensor Circuit Intermittent Low Voltage |
| DTC P1114 | Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage |
| DTC P1115 | Engine Coolant Temperature (ECT) Sensor Circuit Intermittent High Voltage |
| DTC P1125 | Accelerator Pedal Position (APP) System |
| DTC P1133 or P1153 | HO2S Insufficient Switching Bank 1/2 Sensor 1 |
| DTC P1134 or P1154 | HO2S Transition Time Ratio Bank 1/2 Sensor 1 |
| DTC P1380 | Misfire Detected - Rough Road Data Not Available |
| DTC P1381 | Misfire Detected - No Communication With Brake Control Module |
| DTC P1516 | Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance |
| DTC P2101 | Control Module Throttle Actuator Position Performance |
| DTC P2108 | Throttle Actuator Control (TAC) Module Performance |
| DTC P2120 | Accelerator Pedal Position (APP) Sensor 1 Circuit |
| DTC P2121 | Accelerator Pedal Position (APP) Sensor 1 Performance |
| DTC P2125 | Accelerator Pedal Position (APP) Sensor 2 Circuit |
| DTC P2135 | Throttle Position (TP) Sensor 1-2 Correlation |
| DTC U0107 | PCM |
Factory Service Tools
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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.
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