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 |
|---|---|---|---|
| P1625 | Voltage regulator, pedal-travel sensor-potentiometer faulty | 35 | Powertrain |
| P1626 | Theft Deterrent Fuel Enable Signal Lost | 32 | Powertrain |
| P1627 | Torque requirement requested by the driver not be followed | 25 | Powertrain |
| P1628 | Spring does not open | 22 | Powertrain |
| P1629 | Spring does not open | 27 | Powertrain |
| P162A | Engine electronic control unit failure | 17 | Powertrain |
| P162B | Sensor reference voltage D circuit low | 17 | Powertrain |
| P162C | Sensor Reference Voltage D Circuit High | 15 | Powertrain |
| P162D | Internal Control Module Cruise Control Performance | 15 | Powertrain |
| P1630 | Inconsistent request for cruise control | 32 | Powertrain |
| P1631 | Theft Deterrent Start Enable Signal Not Correct | 33 | Powertrain |
| P1632 | Adaptation conditions infringed | 28 | Powertrain |
| P1633 | Fault during test, limp-home point | 30 | Powertrain |
| P1634 | Closing spring faulty | 31 | Powertrain |
| P1635 | Stop learning during first initialisation aborted | 31 | Powertrain |
| P1636 | Throttle activation fault | 29 | Powertrain |
| P1637 | Deviation check | 32 | Powertrain |
| P1638 | Throttle briefly jammed | 28 | Powertrain |
| P1639 | Duty factor > 1s exceeded | 30 | Powertrain |
| P163A | Generator B control circuit | 17 | Powertrain |
| P163B | Generator B field terminal circuit | 16 | Powertrain |
| P163C | Generator B Field Terminal Circuit Low | 12 | Powertrain |
| P163D | Indicator lamp for winter driving program: electrical malfunction | 11 | Powertrain |
| P163E | Glow plug control module overtemperature | 15 | Powertrain |
| P1640 | Quad driver module (QDM) | 29 | Powertrain |
| P1641 | Main relay malfunction | 29 | Powertrain |
| P1642 | CAN link circuit | 28 | Powertrain |
| P1643 | Fault during amplifier adjustment | 30 | Powertrain |
| P1644 | Fault during repetition of stop learning | 25 | Powertrain |
| P1645 | Read error, RAM backup | 28 | Powertrain |
| P1646 | 5V reference #3 circuit | 26 | Powertrain |
| P1647 | Check Coding of ECUs on Powertrain Data Bus | 25 | Powertrain |
| P1648 | Wrong security code entered | 29 | Powertrain |
| P1649 | Write error, RAM backup | 28 | Powertrain |
| P164A | Oil pressure switch: implausible signal; Short to ground | 13 | Powertrain |
| P164B | Fuel pump driver control module read only memory | 12 | Powertrain |
| P164C | Fuel pump driver control module random access memory | 17 | Powertrain |
| P164D | Oil pressure switch for reduced oil pressure: malfunction; Defective | 14 | Powertrain |
| P164E | Fuel injector control module engine controls ignition relay circuit low voltage | 15 | Powertrain |
| P164F | Fuel injector control module engine controls ignition relay circuit high voltage | 10 | Powertrain |
| P1650 | CAN: Device offline | 30 | Powertrain |
| P1651 | Power steering pressure switch input | 32 | Powertrain |
| P1652 | Starter motor system communication | 28 | Powertrain |
| P1653 | SMG torque implausible | 24 | Powertrain |
| P1654 | Timeout message counter | 21 | Powertrain |
| P1655 | Read error, random code, in EEPROM | 27 | Powertrain |
| P1656 | CAN link PCM/PCM circuit/network | 29 | Powertrain |
| P1657 | Engine operating information failure | 25 | Powertrain |
| P1658 | Reversing lamp relay circuit voltage low | 25 | Powertrain |
| P1659 | Reversing lamp relay circuit voltage high | 24 | Powertrain |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.