OBD-II code · Body
B0158 Ambient Air Temperature Sensor Circuit
The HVAC control module has detected an implausible signal from the ambient air temperature sensor used by the climate control system. Symptoms include incorrect outside temperature display and erratic automatic climate behavior.
Is it safe to drive with B0158?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyAmbient air temperature sensor failed
- PossibleWiring or connector fault
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 h
- Emissions test
- Usually unaffected
- Parts involved
- Ambient Air Temperature Sensor, HVAC Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.