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 |
|---|---|---|---|
| P1423 | DME: Flow rate, sec.-air system, too low, bank 1 | 21 | Powertrain |
| P1424 | Secondary Air Injection System | 23 | Powertrain |
| P1425 | Tank vent valve short to ground | 24 | Powertrain |
| P1426 | Tank vent valve open | 19 | Powertrain |
| P1427 | EGR temperature sensor 1 - intake air temperature 1 not plausible | 25 | Powertrain |
| P1428 | EGR temperature sensor 1 - intake air temperature 2 not plausible | 25 | Powertrain |
| P1429 | Circuit for Brake Vacuum Pump: Open Circuit | 23 | Powertrain |
| P142A | Conditions Incorrect For Secondary Air Self Test | 12 | Powertrain |
| P142B | Exhaust Gas Recirculation Sensor D Circuit | 11 | Powertrain |
| P142C | Exhaust Gas Recirculation Sensor D Range/Performance | 9 | Powertrain |
| P142D | Exhaust gas recirculation sensor D - Circuit low | 10 | Powertrain |
| P142E | Exhaust gas recirculation sensor D - Circuit high | 13 | Powertrain |
| P142F | Exhaust gas recirculation sensor D - Circuit intermittent/erratic | 10 | Powertrain |
| P1430 | Electric air pump secondary | 19 | Powertrain |
| P1431 | Brake booster system | 21 | Powertrain |
| P1432 | DME: Secondary-air valve open, mechanically stuck | 23 | Powertrain |
| P1433 | Secondary air injection system pump relay circuit open | 24 | Powertrain |
| P1434 | Secondary air injection system pump relay circuit short to battery (+) | 21 | Powertrain |
| P1435 | Secondary air injection system pump relay circuit short to ground | 22 | Powertrain |
| P1436 | Leak diagnosis pump - line break | 24 | Powertrain |
| P1437 | A/C evaporator air temperature circuit high | 19 | Powertrain |
| P1438 | A/C evaporator air temperature circuit range/performance | 20 | Powertrain |
| P1439 | Floor temperature switch circuit | 16 | Powertrain |
| P143A | Battery State Of Charge Low - A/C Clutch Disabled | 14 | Powertrain |
| P143B | Battery State Of Charge Low - Forced Limited Power | 11 | Powertrain |
| P143C | Reductant heater 3 control circuit shorted | 11 | Powertrain |
| P143E | A/C clutch relay control B circuit low | 9 | Powertrain |
| P143F | A/C clutch relay control B circuit high | 11 | Powertrain |
| P1440 | EVAP small leak | 29 | Powertrain |
| P1441 | Evaporative Emission System Flow During Non-Purge | 25 | Powertrain |
| P1442 | EVAP small leak | 27 | Powertrain |
| P1443 | Leak diagnosis pump - signal high | 32 | Powertrain |
| P1444 | Purge volume control valve | 27 | Powertrain |
| P1445 | Short circuit to negative or open circuit | 23 | Powertrain |
| P1446 | Short circuit to positive | 27 | Powertrain |
| P1447 | Evaporative emission (EVAP) purification flow detection | 28 | Powertrain |
| P1448 | Vent control valve | 24 | Powertrain |
| P1449 | Evaporative check solenoid circuit | 20 | Powertrain |
| P144A | Evaporative Emission (EVAP) system purge vapor line restricted/blocked | 12 | Powertrain |
| P144B | Evaporative Emission (EVAP) system secondary purge vapor line restricted/blocked | 10 | Powertrain |
| P144C | Evaporative Emission (EVAP) system purge flow performance during boost | 10 | Powertrain |
| P144D | PWM cooler - blocked rotor (slave) (signal) | 9 | Powertrain |
| P144E | Closed loop diesel particulate filter (DPF) regeneration control at limit - stage 2 low temperature | 10 | Powertrain |
| P144F | Closed loop diesel particulate filter (DPF) regeneration control at limit - stage 2 high temperature | 10 | Powertrain |
| P1450 | Unable to Bleed Up Fuel Tank Vacuum | 23 | Powertrain |
| P1451 | Evaporative Emission System Vent Control Circuit Malfunction | 24 | Powertrain |
| P1452 | Short circuit to positive | 21 | Powertrain |
| P1453 | Exhaust gas temperature sensor 1 open/short to battery (+) | 23 | Powertrain |
| P1454 | Evaporative System Vacuum Test Malfunction | 16 | Powertrain |
| P1455 | Exhaust gas temperature sensor 1 range/performance | 23 | Powertrain |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.