OBD-II code · Body
B0156 Sun Load Sensor Circuit
The HVAC control module has detected an implausible signal from the sun load (solar) sensor, typically located on the dashboard. Automatic climate control uses this signal to bias cooling on the side facing the sun.
Is it safe to drive with B0156?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySun load 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
- 0.3–1.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Sun Load Sensor, HVAC Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.