Headlight Washer Pump Motor Circuit Fault
The B0085 code means the vehicle's onboard diagnostic system has detected: Headlight Washer Pump Motor Circuit Fault. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $40 - $250 (parts and labor)
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Common Symptoms
- Washer pump does not operate
- No sound from pump
- Windshield washers work but headlight washers do not
- Washer system fault stored
Probable Causes (Ranked by Likelihood)
- Failed washer pump motor Very High
- Corroded pump connector High
- Blown washer fuse Moderate
- BCM washer output failure Low
Step-by-Step Diagnostic Procedure
-
Test pump with direct 12V
-
Check connector for corrosion
-
Inspect washer fuse
-
Test BCM output to relay
Frequently Asked Questions
Where is the washer pump?
On or near the washer fluid reservoir under the hood.
Can I test it myself?
Yes, disconnect and apply 12V directly.
Does cold weather affect it?
Frozen fluid can damage the pump impeller.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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