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 |
|---|---|---|---|
| P165A | Replace electronic control unit (ECU) | 15 | Powertrain |
| P165C | Grill Shutter 'A' Minimum/Maximum Stop Performance | 14 | Powertrain |
| P165D | Grill Shutter 'A' Control Circuit | 10 | Powertrain |
| P165E | Grill Shutter Control Module 'A' Supply Voltage Circuit Low | 11 | Powertrain |
| P165F | Oil pressure regulation valve: short to GND; Lower limit exceeded | 12 | Powertrain |
| P1660 | Receive error, serial interface | 29 | Powertrain |
| P1661 | incorrect EWS telegram | 26 | Powertrain |
| P1662 | Receive error, serial interface | 22 | Powertrain |
| P1663 | Storage, random code | 24 | Powertrain |
| P1664 | Write error, random code, in EEPROM | 25 | Powertrain |
| P1665 | Injection pump control module communications | 26 | Powertrain |
| P1666 | Oxygen sensor malfunction | 27 | Powertrain |
| P1667 | Engine ECU monitoring failure | 25 | Powertrain |
| P1668 | Start value not clearly recognisable | 19 | Powertrain |
| P1669 | Engine ECU monitoring failure | 18 | Powertrain |
| P166A | Fault diagnostic report, turn-off test timeout | 15 | Powertrain |
| P166B | Fault diagnostic report, level 1 and 2 power-on duration implausible | 15 | Powertrain |
| P166C | Engine speed sensor acquisition alarm | 15 | Powertrain |
| P166D | Engine control module: incorrect Installation | 16 | Powertrain |
| P166E | Input shaft 2 sensor collecting warning | 14 | Powertrain |
| P166F | Generator information not programmed | 13 | Powertrain |
| P1670 | SMG intervention implausible | 25 | Powertrain |
| P1671 | Valve for Pump - Jet: Cylinder 6 (N245): Electrical Malfunction | 25 | Powertrain |
| P1672 | Engine speed signal | 22 | Powertrain |
| P1673 | ABS lamp control circuit | 25 | Powertrain |
| P1674 | Power supply - sensor (GAP) | 22 | Powertrain |
| P1675 | Power supply - sensor (GAP) | 24 | Powertrain |
| P1676 | Drive by wire-MIL circuit electrical malfunction | 29 | Powertrain |
| P1677 | Immobilizer system disabled | 28 | Powertrain |
| P1678 | FPTDR Signal Line Failure | 24 | Powertrain |
| P1679 | Drive by Wire-MIL Circ. Open | 26 | Powertrain |
| P167A | Calibration mismatch | 14 | Powertrain |
| P167C | Glow plug control module temperature - intake air temperature sensor 1 correlation | 15 | Powertrain |
| P167E | ECM requested fuel injector control module failure record | 14 | Powertrain |
| P167F | Non-OEM calibration detected | 11 | Powertrain |
| P1680 | Reset-Resistant Limp-Mode Active | 22 | Powertrain |
| P1681 | Function monitoring, speed sensor, supply wire or DME faulty | 27 | Powertrain |
| P1682 | Ignition circuit malfunction | 24 | Powertrain |
| P1683 | Driver 5 Line 3 | 27 | Powertrain |
| P1684 | Driver 5 Line 4 | 28 | Powertrain |
| P1685 | Driver 5 Line 5 | 25 | Powertrain |
| P1686 | Function monitoring, pedal-travel-sensor supply wire or DME fault | 27 | Powertrain |
| P1687 | MIL ON, P1688 & Lack Of Power | 25 | Powertrain |
| P1688 | W11 engine: Fault code stored | 26 | Powertrain |
| P1689 | Engine Control Module | 21 | Powertrain |
| P168A | Level 3 too high | 15 | Powertrain |
| P168B | Level 3 too low | 12 | Powertrain |
| P168C | Turbocharger vane position slow response - increasing position | 12 | Powertrain |
| P168D | Turbocharger vane position slow response - decreasing position | 12 | Powertrain |
| P168E | Fuel injector control module not programmed | 13 | Powertrain |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.