Code result
B0258
HVAC Air Mix Door 1 Circuit
Moderate severity
What it means
The HVAC controller reports a fault in the actuator circuit for air mix door 1, which controls the proportion of warm and cool air in the airflow.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Air mix door actuator motor failed
highOne of the most commonly reported causes for this code — check this first.
Mix door jammed by debris
mediumA plausible cause — test and verify before replacing parts.
Open wiring to actuator
mediumA plausible cause — test and verify before replacing parts.
Related help
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