OBD-II code · Body
B0250 HVAC Air Temperature Internal Sensor Circuit
The HVAC controller has detected a fault in the internal cabin air temperature sensor circuit, used to regulate climate control output.
Is it safe to drive with B0250?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor element failure
- PossibleAspirator/blower fan dirty
- PossibleOpen wiring to sensor
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Cabin Air Temperature Sensor, HVAC Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.