Right temperature control feedback circuit range or performance problem
What it means
B0424. Right temperature control feedback circuit range or performance problem. The HVAC module cannot confirm the passenger air mix door 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
- Failed position feedback sensor in the passenger side right temperature actuator
- Open or short in the right temperature feedback circuit
- Corroded passenger side actuator connector
- Passenger side air mix door binding and stalling the actuator
- Faulty feedback input in the HVAC control module
Standard procedure
- Confirm the code with a scan tool
- Inspect and reseat the passenger side actuator connector
- Test the right temperature feedback circuit for opens and shorts
- Command the passenger side door and compare commanded position to feedback
- Replace the actuator or HVAC control module only after circuit tests pass, then clear the code and retest
Look up another code
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Sources and review
Review: checked against the recorded source material.
- B0424 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 B0424
Fetched directly. B0424 reads "Temperature Control Right Feedback Circuit Actuator Range/Performance".
- Code B0424 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: Temperature control #2 (passenger) feedback circuit range/performance More details about the error B0424 and possible reasons for its occurr.
Last updated 2026-10-10.
Report a correction for B0424. Include your vehicle, the issue and a source if you have one.