Code result
B0156
Sun Load Sensor Circuit
Moderate severity
What it means
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?
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
Sun load sensor failed
highOne of the most commonly reported causes for this code — check this first.
Wiring or connector fault
mediumA plausible cause — test and verify before replacing parts.
Related help
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