Temperature control 2 circuit range error
What it means
B0419. Temperature control 2 circuit range error. The HVAC module sees the right air mix door feedback outside its expected range and turns on the body warning light.. This Chevy-enhanced code applies to Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile and Saturn models that use this code.
Findings, check these first
- Right air mix door binding in its travel
- Stripped gears in the right air temperature door actuator
- Right air mix door position sensor reporting outside range
- Obstruction in the right air mix door travel
- Failed right air temperature actuator
Standard procedure
- Confirm the code with a scan tool
- Command the right air mix door and watch for a full sweep
- Inspect the right air mix door for binding or an obstruction
- Test the right air mix door position feedback
- Replace the right air temperature actuator only after circuit tests pass, then clear the code and retest
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Sources and review
Review: checked against the recorded source material.
- B0419 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 B0419
Fetched directly. B0419 reads "Temperature Control 2 Circuit Range".
- Code B0419 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: Air Mix Door #2 Range Error More details about the error B0419 and possible reasons for its occurrence.
Last updated 2026-10-10.
Report a correction for B0419. Include your vehicle, the issue and a source if you have one.