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 |
|---|---|---|---|
| P1456 | EVAP Control System | 27 | Powertrain |
| P1457 | Exhaust gas temperature sensor 2 open/short to battery (+) | 21 | Powertrain |
| P1458 | Exhaust gas temperature sensor 2 short to ground | 23 | Powertrain |
| P1459 | Exhaust gas temperature sensor 2 range/performance | 20 | Powertrain |
| P145A | A/C Pressure Insufficient - A/C Clutch Disabled | 16 | Powertrain |
| P145C | EGR low pressure valve control out 2 (circuit short to ground) | 15 | Powertrain |
| P145D | Evaporative Emission (EVAP) system leak detection pump stuck on | 15 | Powertrain |
| P145E | Mass air flow during regeneration too low; Short to plus | 16 | Powertrain |
| P145F | Mass air flow during regeneration too high; Short to ground | 16 | Powertrain |
| P1460 | Auxiliary air system fault | 21 | Powertrain |
| P1461 | A/C pressure sensor circuit high input | 24 | Powertrain |
| P1462 | A/C pressure sensor circuit low input | 23 | Powertrain |
| P1463 | Left AIR system malfunction | 21 | Powertrain |
| P1464 | A/C On During KOER/CCT Test | 20 | Powertrain |
| P1465 | A/C Relay Circuit | 19 | Powertrain |
| P1466 | A/C Refrigerant Temp Sens Circ | 20 | Powertrain |
| P1467 | A/C Compressor Temperature Sensor Malfunction | 18 | Powertrain |
| P1468 | SSPOD Open Circuit or Closed Circuit Fault | 15 | Powertrain |
| P1469 | Rapid A/C Cycling | 20 | Powertrain |
| P146A | Malfunction Diesel Particle Filter Bank 1 Temperature increase not sufficient was detected | 14 | Powertrain |
| P146B | Malfunction Diesel Particle Filter Bank 2 Temperature increase not sufficient was detected | 13 | Powertrain |
| P146C | Exhaust Gas Recirculation (EGR) position signal error | 13 | Powertrain |
| P146D | Feedback from reductant tank heater 1: short to plus; No signal/communication | 13 | Powertrain |
| P146E | Exhaust Gas Recirculation (EGR) mixing valve position signal error | 10 | Powertrain |
| P146F | EVAP purge system pressure sensor performance | 10 | Powertrain |
| P1470 | DME: Activation, solenoid valve, tank-leak diagnosis pump | 21 | Powertrain |
| P1471 | Diesel particulate filter (DPF) regeneration incomplete | 24 | Powertrain |
| P1472 | EVAP emission control LDP circuit short to ground | 23 | Powertrain |
| P1473 | Fan circuit open (VLCM) | 23 | Powertrain |
| P1474 | EVAP canister purge solenoid valve electrical malfunction | 18 | Powertrain |
| P1475 | DME: Tank-leak diagnosis pump, reed switch not closed | 23 | Powertrain |
| P1476 | Leak diagnosis pump - blocked line | 19 | Powertrain |
| P1477 | DME: Tank-leak diagnosis pump, reed switch does not open | 20 | Powertrain |
| P1478 | EVAP emission control LDP circuit clamped tube detected | 15 | Powertrain |
| P1479 | Brake boost vacuum system: mechanical failure; Defective | 19 | Powertrain |
| P147A | Control circuit for brake boost vacuum pump: electrical malfunction | 10 | Powertrain |
| P147B | Oxygen concentration value large and implausible at overrun | 11 | Powertrain |
| P147F | D - Misfire Detected In Cyl 6 | 10 | Powertrain |
| P1480 | Preglow control | 25 | Powertrain |
| P1481 | Glow plug failure | 23 | Powertrain |
| P1482 | Preglow control module | 23 | Powertrain |
| P1483 | Fan Circ Shorted To Ground | 17 | Powertrain |
| P1484 | Open Power To Ground VCRM | 16 | Powertrain |
| P1485 | Cooling fan output circuit | 18 | Powertrain |
| P1486 | EGRA Circuit Malfunction | 21 | Powertrain |
| P1487 | EGR-CHK (Boost) Solenoid Circuit | 16 | Powertrain |
| P1488 | Auxiliary 5V Supply Output Too Low | 12 | Powertrain |
| P1489 | Hi Speed Fan CTRL Relay Circ | 13 | Powertrain |
| P148A | Cooling fan signal circuit performance | 11 | Powertrain |
| P148B | Cooling fan signal circuit low voltage | 11 | Powertrain |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.