P1554 BUICK – Cruise Engaged Circuit High Voltage

P1547 BUICK – A/C System Performance Degraded

P1548 BUICK – A/C Recirculation Circuit

P1546 BUICK – Air Conditioning Clutch Feedback Circuit Low Voltage

P1544 BUICK – A/C Refrigerant Condition Very Low

P1545 BUICK – A/C Clutch Relay Control Circuit

P1542 BUICK – A/C System High Pressure High Temperature

P1543 BUICK – A/C System Performance

P1541 BUICK – A/C High Side Over Temperature

P1538 BUICK – A/C request Circuit High Voltage

P1539 BUICK – Air Conditioning Clutch Feedback Circuit High Voltage

P1537 BUICK – A/C Request Circuit Low Voltage

P1535 BUICK – A/C High Side Temperature Sensor Circuit

P1536 BUICK – A/C System – ECT Overtemperature

P1533 BUICK – A/C Evaporator Temperature Sensor Circuit High Voltage

P1534 BUICK – A/C High Side Temperature Sensor Low Voltage

P1532 BUICK – A/C Evaporator Temperature Sensor Circuit Low Voltage

P1530 BUICK – Ignition Timing Adjustment Switch Circuit

P1531 BUICK – A/C Low Side Temerature Sensor Fault

P1528 BUICK – Governor