Code result
B0255
HVAC Air Temperature External Sensor Circuit
Moderate severity
What it means
A fault has been detected in the external (ambient) temperature sensor circuit used by the HVAC and instrument cluster.
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
Ambient sensor failure (often behind front grille)
highOne of the most commonly reported causes for this code — check this first.
Water in connector
mediumA plausible cause — test and verify before replacing parts.
Related help
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