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 |
|---|---|---|---|
| P122F | Intake air flow valve control circuit 2 high voltage | 10 | Powertrain |
| P1230 | Pressure adjustment control solenoid valve fault | 30 | Powertrain |
| P1231 | Cylinder 7 fuel injection circuit short to ground | 26 | Powertrain |
| P1232 | Pressure regulator | 28 | Powertrain |
| P1233 | Fuel Pump Driver Module Offline | 32 | Powertrain |
| P1234 | Short circuit to ground | 33 | Powertrain |
| P1235 | Fuel Pump Control Out of Range | 30 | Powertrain |
| P1236 | The boost pressure sensor signal is implausible when the engine is not running. | 35 | Powertrain |
| P1237 | Boost pressure sensor circuit voltage low intermittently | 31 | Powertrain |
| P1238 | Boost pressure sensor circuit voltage high intermittently | 32 | Powertrain |
| P1239 | Fuel injector for cylinder 3 (N32): open circuit | 32 | Powertrain |
| P123A | Barometric pressure - Turbocharger/supercharger boost correlation - Sensor A | 15 | Powertrain |
| P123B | Barometric pressure - Turbocharger/supercharger boost correlation - Sensor B | 14 | Powertrain |
| P123C | Cold Start Turbocharger Protection - Forced Limited Power | 15 | Powertrain |
| P123D | Fuel tank pressure sensor voltage high | 11 | Powertrain |
| P123E | Canister high load desorption circuit leakage | 10 | Powertrain |
| P123F | Linear oxygen sensor heating circuit low | 14 | Powertrain |
| P1240 | Cylinder 4 fuel injection circuit open | 28 | Powertrain |
| P1241 | Fuel Injector for Cylinder 5 (N83): Open Circuit | 28 | Powertrain |
| P1242 | Fuel Injector for Cylinder 6 (N84): Open Circuit | 29 | Powertrain |
| P1243 | Cylinder 7 fuel injection circuit open | 22 | Powertrain |
| P1244 | Fuel Injector for Cylinder 8 (N86): Open Circuit | 23 | Powertrain |
| P1245 | Needle lift sensor circuit short to ground | 26 | Powertrain |
| P1246 | 1. Might by stored with other codes like 17654/ /004678 | 24 | Powertrain |
| P1247 | Needle Lift Sensor (G80): Open or Short to Plus | 22 | Powertrain |
| P1248 | Turbo boost pressure not detected | 24 | Powertrain |
| P1249 | Wastegate Fail Steady State Test | 21 | Powertrain |
| P124A | Vacuum pump relay 2 control circuit low | 9 | Powertrain |
| P124B | Vacuum pump relay 2 control circuit open | 9 | Powertrain |
| P124C | Cylinder 5 injector high control circuit shorted to control circuit | 10 | Powertrain |
| P124D | Cylinder 6 injector high control circuit shorted to control circuit | 11 | Powertrain |
| P124E | Linear oxygen sensor pump current circuit short to ground | 10 | Powertrain |
| P124F | Linear oxygen sensor pump current circuit short to power | 10 | Powertrain |
| P1250 | Fuel level too low | 30 | Powertrain |
| P1251 | Re-conveying pump circuit open | 28 | Powertrain |
| P1252 | Pedal correlation PDS1 and LPDS high | 28 | Powertrain |
| P1253 | VSV Stuck on VR | 26 | Powertrain |
| P1254 | Fuel consumption signal Short to B+ | 24 | Powertrain |
| P1255 | Fuel pump control module driver high temperature | 27 | Powertrain |
| P1256 | Contactor forced disconnection | 29 | Powertrain |
| P1257 | Supercharge Engine Over Boost | 21 | Powertrain |
| P1258 | Alarm signal error | 24 | Powertrain |
| P1259 | Electronic stability control (ESC) master cylinder pressure signal is invalid | 25 | Powertrain |
| P125A | Fuel pressure regulator 2 high control circuit low voltage | 12 | Powertrain |
| P125B | Vapor Bubble Formation in low-pressure fuel circuit; Short to ground | 12 | Powertrain |
| P125C | ECU internal fault 11 | 10 | Powertrain |
| P125D | Alternative fuel high pressure system small leak detected | 11 | Powertrain |
| P125F | Electronic thermostat control circuit low | 9 | Powertrain |
| P1260 | Theft Detected - Engine Disabled | 23 | Powertrain |
| P1261 | Rise time is lower than the threshold (cylinder 1) | 25 | Powertrain |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.