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 |
|---|---|---|---|
| P1548 | Boost pressure control valve open | 16 | Powertrain |
| P1549 | Boost pressure control valve short to ground | 20 | Powertrain |
| P154A | Intake air heater feedback circuit | 13 | Powertrain |
| P154B | Particulate Filter Regeneration. Frequency Too High | 11 | Powertrain |
| P154C | Intake Air Heater Current Signal Circuit | 9 | Powertrain |
| P154D | charger 2: malfunction; Defective | 10 | Powertrain |
| P154E | Boost pressure regulation bank 2: malfunction; Short to plus | 12 | Powertrain |
| P154F | Boost pressure regulation: malfunction; Open circuit | 14 | Powertrain |
| P1550 | DME: Activation, idle-speed control valve/closing coil | 30 | Powertrain |
| P1551 | BECB current measurement fault | 27 | Powertrain |
| P1552 | BECB voltage measurement fault | 24 | Powertrain |
| P1553 | Idle Air Control Valve | 24 | Powertrain |
| P1554 | Cruise Control Feedback Circuit | 27 | Powertrain |
| P1555 | Brake vacuum booster pump relay circuit short leading to high voltage | 27 | Powertrain |
| P1556 | Small leakage of vacuum degree of brake vacuum booster pump | 27 | Powertrain |
| P1557 | Brake vacuum system slow leak | 22 | Powertrain |
| P1558 | Throttle actuator (G186): electrical malfunction; Open circuit | 22 | Powertrain |
| P1559 | Throttle body (J338): fault in basic settings | 26 | Powertrain |
| P155A | Boost pressure regulation: lower limit not reached; Open or short to ground | 11 | Powertrain |
| P155B | Boost pressure regulation: adaptation range not reached; No signal/communication | 10 | Powertrain |
| P155C | Boost pressure regulation: adaptation range exceeded; No or incorrect basic setting / adaptation | 10 | Powertrain |
| P155D | Boost pressure bank 2: too high; Cannot be tested at this time | 11 | Powertrain |
| P155E | DC/DC Converter Output Voltage Signal Message Counter Incorrect | 8 | Powertrain |
| P155F | Klem S spanning | 9 | Powertrain |
| P1560 | High voltage related fault | 29 | Powertrain |
| P1561 | System voltage low voltage | 24 | Powertrain |
| P1562 | System voltage low alarm | 30 | Powertrain |
| P1563 | Quantity Adjuster (N146): Lower Limit Reached | 28 | Powertrain |
| P1564 | Idle speed control throttle position Low voltage during adaptation | 33 | Powertrain |
| P1565 | Signal implausible | 29 | Powertrain |
| P1566 | Signal reveals frequency error | 25 | Powertrain |
| P1567 | Battery temperature too high | 22 | Powertrain |
| P1568 | Toggle bit incorrect | 28 | Powertrain |
| P1569 | Cruise control switch incorrect signal | 18 | Powertrain |
| P156A | Battery capacity abnormal | 10 | Powertrain |
| P156B | System voltage fault | 10 | Powertrain |
| P156C | Battery voltage abnormal | 9 | Powertrain |
| P156D | DC/DC Converter Ignition Switch Run/Start Signal Message Counter Incorrect | 8 | Powertrain |
| P156E | DC/DC-omformer svivsignal meldingsteller feil | 7 | Powertrain |
| P156F | Høyspenning tillatt signal meldingsteller feil | 9 | Powertrain |
| P1570 | Control module locked | 25 | Powertrain |
| P1571 | Traction control torque request circuit | 30 | Powertrain |
| P1572 | Left engine Mount solenoid valve short to ground | 33 | Powertrain |
| P1573 | Left engine mount solenoid valve (N144): open circuit; Defective | 20 | Powertrain |
| P1574 | Stop lamp switch circuit | 29 | Powertrain |
| P1575 | Right engine mount solenoid valve (N145): short to plus | 29 | Powertrain |
| P1576 | Pedal position not available | 27 | Powertrain |
| P1577 | Pedal position sensor outputs disagree | 27 | Powertrain |
| P1578 | ETC power less than demand | 22 | Powertrain |
| P1579 | ETC in power limiting mode | 29 | Powertrain |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.