Pontiac specific DTC OBD2 code: P1543 A/C System Performance
Pontiac specific DTC OBD2 code: P1542 A/C System High Pressure High Temperature
Pontiac specific DTC OBD2 code: P1541 A/C High Side Over Temperature
Pontiac specific DTC OBD2 code: P1540 A/C System High Pressure
Pontiac specific DTC OBD2 code: P1539 Air Conditioning (A/C) Clutch Feedback Circuit High Voltage
Pontiac specific DTC OBD2 code: P1538 A/C request Circuit High Voltage
Pontiac specific DTC OBD2 code: P1537 A/C Request Circuit Low Voltage
Pontiac specific DTC OBD2 code: P1536 A/C System – ECT Overtemperature
Pontiac specific DTC OBD2 code: P1535 A/C High Side Temperature Sensor Circuit
Pontiac specific DTC OBD2 code: P1534 A/C High Side Temperature Sensor Low Voltage