Left air temperature actuator circuit fault
What it means
B0441. Left air temperature actuator circuit fault. The driver side air mix door cannot reach the commanded position and the body warning light comes on.. This Chevy-enhanced code applies to Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile and Saturn models that use this code.
Findings, check these first
- Faulty left air temperature actuator
- Actuator harness open or shorted
- Poor electrical connection at the actuator
- Faulty HVAC control module
Standard procedure
- Confirm the code with a scan tool
- Inspect the actuator and its connector for damage
- Test the actuator circuit for opens, shorts and poor connections
- Command the left door with the scan tool and watch for movement
- Replace the actuator or HVAC module only after circuit tests pass
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Sources and review
Review: checked against the recorded source material.
- B0441 CHEVROLET Code: Meaning, Causes, and Symptoms | OBD2 Codes - OBD2 Codes
live reference page (obd2-codes.co)
Supports: CHEVROLET and GM-family meaning and likely causes for B0441
Fetched directly. B0441 reads "Left Air Temperature Actuator".
- Code B0441 meaning and causes | OBDII.pro
live reference page (obdii.pro)
Supports: independent corroboration of the GM meaning
Fetched directly. obdii.pro is a separate publisher and gives the GM meaning as: Auxiliary heater glow plug circuit high More details about the error B0441 and possible reasons for its occurrence.
Source caveat: obdii.pro lists GM: Auxiliary heater glow plug circuit high, which disagrees with the obd2-codes.co left air temperature actuator meaning. The obd2-codes.co meaning is used for this entry; verify against the vehicle service information.
Last updated 2026-10-02.
Report a correction for B0441. Include your vehicle, the issue and a source if you have one.