GMC fault codes
Coverage shown is GM data: 17,703 codes · 2,212 vehicle records · 180 ECU records · 10,756 live-data parameters.
GMC shares fault-code data with GM. Data may not cover GMC-specific systems.
Codes 17,703
| Code | Description | Brands | System |
|---|---|---|---|
| P29FC | No description available | 6 | Powertrain |
| P29FE | No description available | 6 | Powertrain |
| P2A00 | The upstream oxygen sensor enters the working voltage too slowly/the upstream oxygen sensor exits the ready state | 36 | Powertrain |
| P2A01 | Front oxygen sensor deceleration fuel cut-off response too slow | 32 | Powertrain |
| P2A02 | O2 Sensor Circuit Range/Performance Bank 1 Sensor 3 | 22 | Powertrain |
| P2A03 | O2 Sensor Circuit Range/Performance Bank 2 Sensor 1 | 27 | Powertrain |
| P2A04 | O2 Sensor Circuit Range/Performance Bank 2 Sensor 2 | 28 | Powertrain |
| P2A05 | O2 Sensor Circuit Range/Performance Bank 2 Sensor 3 | 20 | Powertrain |
| P2A06 | O2 Sensor Negative Voltage Bank 1 Sensor 1 | 22 | Powertrain |
| P2A07 | O2 Sensor Negative Voltage Bank 1 Sensor 2 | 20 | Powertrain |
| P2A08 | O2 Sensor Negative Voltage Bank 1 Sensor 3 | 19 | Powertrain |
| P2A09 | O2 Sensor Negative Voltage Bank 2 Sensor 1 | 19 | Powertrain |
| P2A0B | Manifold absolute pressure sensor 'B' circuit range/performance | 10 | Powertrain |
| P2A0C | Manifold absolute pressure sensor 'B' circuit low | 11 | Powertrain |
| P2A0D | Manifold absolute pressure sensor 'B' circuit high | 11 | Powertrain |
| P2A10 | O2 Sensor Negative Voltage Bank 2 Sensor 2 | 19 | Powertrain |
| P2A11 | O2 Sensor Negative Voltage Bank 2 Sensor 3 | 19 | Powertrain |
| P2A22 | Alternative fuel tank shutoff valve 'B' control circuit/open | 10 | Powertrain |
| P2A23 | Alternative fuel tank shutoff valve 'B' control circuit performance/stuck off | 10 | Powertrain |
| P2A24 | Alternative fuel tank shutoff valve 'B' control circuit low | 10 | Powertrain |
| P2A25 | Alternative fuel tank shutoff valve 'B' control circuit high | 10 | Powertrain |
| P2A26 | Alternative fuel tank shutoff valve 'C' control circuit/open | 10 | Powertrain |
| P2A27 | Alternative fuel tank shutoff valve 'C' control circuit performance/stuck off | 10 | Powertrain |
| P2A28 | Alternative fuel tank shutoff valve 'C' control circuit low | 10 | Powertrain |
| P2A29 | Alternative fuel tank shutoff valve 'C' control circuit high | 10 | Powertrain |
| P2A2A | Alternative fuel tank shutoff valve 'D' control circuit/open | 10 | Powertrain |
| P2A2B | Alternative fuel tank shutoff valve 'D' control circuit performance/stuck off | 10 | Powertrain |
| P2A2C | Alternative fuel tank shutoff valve 'D' control circuit low | 10 | Powertrain |
| P2A2D | Alternative fuel tank shutoff valve 'D' control circuit high | 10 | Powertrain |
| P2A33 | AFCM power relay control circuit low | 10 | Powertrain |
| P2A34 | AFCM power relay control circuit high | 10 | Powertrain |
| P2A36 | AFCM power relay sense circuit low | 10 | Powertrain |
| P2A37 | AFCM power relay sense circuit high | 10 | Powertrain |
| P2A9D | Alternative fuel high pressure system small leak | 10 | Powertrain |
| P2AA5 | EGR Cooler Bypass Control Circuit Driver Current/Temperature Too High Bank 1 | 10 | Powertrain |
| P2AB0 | Particulate matter sensor processor performance | 15 | Powertrain |
| P2AB8 | Wastegate position sensor 'A' circuit low | 12 | Powertrain |
| P2AB9 | Wastegate position sensor 'A' circuit high | 12 | Powertrain |
| P2ABB | Wastegate position sensor 'B' circuit low | 10 | Powertrain |
| P2ABC | Wastegate position sensor 'B' circuit high | 10 | Powertrain |
| P2ABD | Turbocharger/supercharger wastegate actuator 'A' driver current/temperature too high | 12 | Powertrain |
| P2ABE | Turbocharger/supercharger wastegate actuator 'B' driver current/temperature too high | 10 | Powertrain |
| P2AD1 | Throttle/pedal position sensor/switch 'C'/'G' voltage correlation | 10 | Powertrain |
| P2AD7 | Reductant Pump Motor Position Sensor Circuit Range/Performance | 9 | Powertrain |
| P2ADA | Reductant Tank Temperature Sensor 'B' Circuit Range/Performance | 10 | Powertrain |
| P2ADB | Reductant Tank Temperature Sensor 'B' Circuit Low | 9 | Powertrain |
| P2ADC | Reductant Tank Temperature Sensor 'B' Circuit High | 9 | Powertrain |
| P2ADD | Reductant Tank Temperature Sensor 'B' Circuit Intermittent/Erratic | 9 | Powertrain |
| P2AFC | Kylvätsketemperaturgivare 4 krets | 10 | Powertrain |
| P2AFD | Deactivation. Exhaust Valve. Bank 1 | 10 | Powertrain |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.