OBD Guide
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B2101

Head Rest Switch Circuit Failure

B2101 is an OBD-II diagnostic trouble code meaning: Head Rest Switch Circuit Failure. Common causes: open or short circuit in wiring harness, switch contact corrosion. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Headrest adjustment does not work
  • The security system malfunction indicator is on
  • The headrest is fixed in one position

Causes

  • Open or short circuit in wiring harness
  • Switch contact corrosion
  • Headrest switch malfunction
  • Problems with the security control unit
  • Blown fuse

How to Fix

  1. Check the integrity of the wiring harness
  2. Clean switch contacts
  3. Replace the headrest switch if necessary
  4. Check and replace fuses
  5. Flash the control unit if necessary

Related codes

B2100B2102

FAQ

What does the B2101 code mean?

B2101 is an OBD-II diagnostic trouble code that indicates: Head Rest Switch Circuit Failure

What causes a B2101 error code?

The most common causes of B2101 include: Open or short circuit in wiring harness; Switch contact corrosion; Headrest switch malfunction; Problems with the security control unit.

How do I fix a B2101 diagnostic trouble code?

To fix B2101: Check the integrity of the wiring harness. Clean switch contacts. Replace the headrest switch if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2101?

Limited driving only, diagnose soon

How much does it cost to fix B2101?

The estimated repair cost for B2101 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat