Retrieving Diagnostic Trouble Codes
WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue. However, it is still accessible from the selected car via links, so may be relevant.
Diagnosis of temperature control portion of HVAC system is based on Diagnostic Trouble Codes (DTC) stored in HVAC control module. The HVAC control module will store either a current or history DTC depending on type of fault detected.
For system diagnosis, use a scan tool to check for any DTCs that may be set. If a DTC is set, go to appropriate diagnostic procedure. See DIAGNOSTIC TROUBLE CODE INDEX table. After a repair is completed, DTCs must be cleared from memory to ensure proper system operation. See CLEARING DIAGNOSTIC TROUBLE CODES . If no DTCs are set, diagnose problem by symptom, see appropriate test procedure under SYMPTOM TESTS .
DIAGNOSTIC TROUBLE CODE INDEX
| DTC | Fault |
|---|---|
| P0530 | A/C Refrigerant Pressure Sensor High Or Low Voltage |
| P1546 | Short Or Open In A/C Compressor Clutch Relay Circuit |