Buick specific DTC OBD2 code: P1542 A/C System High Pressure High Temperature
Buick specific DTC OBD2 code: P1543 A/C System Performance
Buick specific DTC OBD2 code: P1544 A/C Refrigerant Condition Very Low
Buick specific DTC OBD2 code: P1545 A/C Clutch Relay Control Circuit
Buick specific DTC OBD2 code: P1546 Air Conditioning (A/C) Clutch Feedback Circuit Low Voltage
Buick specific DTC OBD2 code: P1547 A/C System Performance Degraded
Buick specific DTC OBD2 code: P1548 A/C Recirculation Circuit
Buick specific DTC OBD2 code: P1554 Cruise Engaged Circuit High Voltage
Buick specific DTC OBD2 code: P1555 Electronic Variable Orifice Output
Buick specific DTC OBD2 code: P1558 Cruise Control Servo Indicates Low