General Motors GM specific DTC OBD2 code: P1690 ECM Loop Overrun
General Motors GM specific DTC OBD2 code: P1791 Transmission Control Module Loop
General Motors GM specific DTC OBD2 code: P1672 Low Engine Oil Level Lamp Control Circuit
General Motors GM specific DTC OBD2 code: P1691 Coolant Gage Circuit Low Voltage
General Motors GM specific DTC OBD2 code: P1792 Transmission Control Module Reprogrammable Memory
General Motors GM specific DTC OBD2 code: P1621 PCM Memory Performance
General Motors GM specific DTC OBD2 code: P1637 Generator L-Terminal Circuit
General Motors GM specific DTC OBD2 code: P1655 EVAP Purge Solenoid Control Circuit
General Motors GM specific DTC OBD2 code: P1622 Cylinder Select
General Motors GM specific DTC OBD2 code: P1638 Generator F-Terminal Circuit