B0156: Sun Load Sensor Circuit
Standardized SAE J2012 code · B01xx codes
What does B0156 mean?
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.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
Common causes
- High Sun load sensor failed
- Medium Wiring or connector fault
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of B0156 on the same make and model first.
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