B0305
HVAC Sun Load Sensor Circuit
A fault has been detected in the sun load sensor circuit used by automatic climate control to compensate for solar gain.
A fault has been detected in the sun load sensor circuit used by automatic climate control to compensate for solar gain.
Common causes
- high
Sun load sensor failure
One of the most commonly reported causes for this code — check this first.
Typical part cost: $70-280
- medium
Open wire in dashboard
A plausible cause — test and verify before replacing parts.
Typical part cost: $70-280
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does B0305 mean?
B0305 means "HVAC Sun Load Sensor Circuit". It is a generic OBD-II code that points to a fault in the body.
What are the most common causes of B0305?
sun load sensor failure; open wire in dashboard — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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