B2101: Head Rest Switch Circuit Failure
OTHER
System
Body
What Does B2101 Mean?
B2101 is a manufacturer-specific diagnostic trouble code: Head Rest Switch Circuit Failure. This code applies to OTHER vehicles. Unlike generic OBD-II codes, manufacturer-specific codes are defined by the vehicle maker and may only apply to certain makes and models.
Symptoms of B2101
- ⚠️ Warning light on
- ⚠️ Electrical system malfunction
Frequently Asked Questions
What does B2101 mean?
Head Rest Switch Circuit Failure. This is a manufacturer-specific code for OTHER vehicles.
Which vehicles get code B2101?
This code appears primarily in OTHER vehicles. Check your owner's manual or a dealer for model-specific information.
Can I fix this myself?
Manufacturer-specific codes often require a brand-specific diagnostic scanner for full data. A dealer or specialist with the right tools will diagnose it most accurately.
What To Do Next
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.