B0285
Electric Rear Defrost Circuit Low
B0285 is an OBD-II diagnostic trouble code meaning: Electric Rear Defrost Circuit Low. Common causes: broken or damaged wiring harness, heating relay malfunction. Estimated repair cost: $56–167.
Symptoms
- Heated rear window does not work
- The malfunction indicator on the dashboard lights up
- Reduced visibility in cold weather
Causes
- Broken or damaged wiring harness
- Heating relay malfunction
- Damage to the heating element
- Short circuit in the circuit
- Problems with the control unit
How to Fix
- Check the voltage on the heating circuit
- Inspect the wiring harness for damage
- Check heating relay
- Check the integrity of the heating element
- Replace faulty components
Related codes
Error B0285 by Vehicle Brand
FAQ
What does the B0285 code mean?
B0285 is an OBD-II diagnostic trouble code that indicates: Electric Rear Defrost Circuit Low
What causes a B0285 error code?
The most common causes of B0285 include: Broken or damaged wiring harness; Heating relay malfunction; Damage to the heating element; Short circuit in the circuit.
How do I fix a B0285 diagnostic trouble code?
To fix B0285: Check the voltage on the heating circuit. Inspect the wiring harness for damage. Check heating relay. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B0285?
Limited driving only, diagnose soon
How much does it cost to fix B0285?
The estimated repair cost for B0285 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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