Pontiac specific DTC OBD2 code: P1642 FC Relay 2 And 3 Control Circuit
Pontiac specific DTC OBD2 code: P1641 FC Relay 1 Control Circuit
Pontiac specific DTC OBD2 code: P1640 Driver 1-Input High Voltage
Pontiac specific DTC OBD2 code: P1639 5 Volt Reference 2 Circuit
Pontiac specific DTC OBD2 code: P1638 Generator F-Terminal Circuit
Pontiac specific DTC OBD2 code: P1637 Generator L-Terminal Circuit
Pontiac specific DTC OBD2 code: P1636 PCM Stack Overrun
Pontiac specific DTC OBD2 code: P1635 5 Volt Reference 1 Circuit
Pontiac specific DTC OBD2 code: P1634 Ignition 1 Power Circuit Low Voltage
Pontiac specific DTC OBD2 code: P1633 Ignition Supply Power Circuit Low Voltage