Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2004 Pontiac Aztek Base, FWDFACTORY OEM SERVICE PROCEDURE
HVAC, Automatic DTCS
HVAC - AUTOMATIC DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC B0165 or B0166 | Passenger Compartment Temp Sensor 1 Circuit Low/High |
| DTC B0233 | Air Flow Control Circuit |
| DTC B0408 or B0418 | Temperature Control Circuit |
| DTC B3933 | Air Conditioning (A/C) Evaporator Temperature Sensor Circuit |
| DTC P0530, P0532, or P0533 | Air Conditioning (A/C) Refrigerant Pressure Sensor Signal Circuit Too Low or Too High |
| DTC P0645, P0646, or P0647 | Air Conditioning (A/C) Clutch Relay Control Circuit |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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