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.
2003 Pontiac Aztek AWDFACTORY OEM SERVICE PROCEDURE
HVAC, Automatic DTCS
AUTOMATIC A/C-HEATER DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC B0165 or B0166 | Inside Air Temperature Sensor Signal Circuit Voltage |
| DTC B0233 | Mode Actuator Position Signal |
| DTC B0408 or B0418 | Air Temperature Position Signal |
| DTC B3933 | Evaporator Temperature Sensor Voltage Low |
| DTC P0530 | A/C Refrigerant Pressure Sensor Voltage |
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.