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 Buick Century BaseFACTORY OEM SERVICE PROCEDURE
HVAC, Automatic DTCS
HVAC, AUTOMATIC DIAGNOSTIC TROUBLE CODE (DTCS) LIST
| DTC | Description |
|---|---|
| DTC B0332, B0333, B0337, Or B0338 | Ambient Air Temperature Sensor |
| DTC B0348 | Control Module Signal Circuit Voltage |
| DTC B0361 or B0365 | Left/Right Air Temperature Actuator |
| DTC B0363 or B0367 | Left/Right Air Temperature Actuator |
| DTC B0441 or B0446 | Left/Right Air Temperature Actuator |
| DTC P0530 (L36, L67) | A/C Refrigerant Pressure Sensor Signal Voltage |
| DTC P0530 (LG8) | A/C Refrigerant Pressure Sensor Signal Voltage |
| DTC P1546 (L36, L67) | Ignition Voltage |
| DTC P1546 (LG8) | Control Circuit 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.