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 IDENTIFICATION table. If no DTCs are set, diagnose problem by symptom. See symptoms listed under TROUBLE SHOOTING .
DIAGNOSTIC TROUBLE CODE IDENTIFICATION
| DTC | Fault |
|---|---|
| B0332 | Outside Air Temperature Sensor Shorted To Ground |
| B0333 | Outside Air Temperature Sensor Circuit Open |
| B0337 | In-Vehicle Air Temperature Sensor Shorted To Ground |
| B0338 | In-Vehicle Air Temperature Sensor Circuit Open |
| B0348 | Sun Load Temperature Sensor Circuit Open |
| B0361 | Left Actuator Feedback Short To Ground |
| B0363 | Left Actuator Feedback Open |
| B0365 | Right Actuator Feedback Short To Ground |
| B0367 | Right Actuator Feedback Open |
| B0441 | Left-Side Temperature Valve Actuator Shorted Or Open |
| B0446 | Right-Side Temperature Valve Actuator Shorted Or Open |
| P0530 | A/C Pressure Sensor Reading Too High Or Too Low |
| P1546 | A/C Relay Circuit Malfunction |