Headlight Washer System Malfunction
The B0084 code means the vehicle's onboard diagnostic system has detected: Headlight Washer System Malfunction. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $30 - $300 (parts and labor)
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Common Symptoms
- Headlight washers do not spray
- Washer pump does not run
- Washer nozzles stuck retracted
- Low fluid but washer inoperative
Probable Causes (Ranked by Likelihood)
- Failed headlight washer pump Very High
- Clogged washer nozzles High
- Frozen fluid lines in cold weather Moderate
- Washer relay or fuse failure Low
Step-by-Step Diagnostic Procedure
-
Check washer fluid level
-
Test pump with direct power
-
Inspect nozzles for clogs
-
Check relay and fuse
Frequently Asked Questions
Why do some vehicles have headlight washers?
Required by European regulations on HID or LED headlights.
Same fluid as windshield?
They share the reservoir but have a separate pump.
Can I disable them?
Possible but may trigger fault codes and affect inspections.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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