OBD Guide
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B2108

Trunk Key Cylinder Switch Failure

B2108 is an OBD-II diagnostic trouble code meaning: Trunk Key Cylinder Switch Failure. Common causes: open circuit switch, short circuit. Estimated repair cost: $11–56.

Severity
✅ Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$11–56 (est.)

Symptoms

  • Trunk status indicators on the instrument panel do not work
  • Problems with remote trunk release
  • False alarms

Causes

  • Open circuit switch
  • Short circuit
  • Mechanical damage to the switch
  • Contact corrosion
  • Wiring harness damage

How to Fix

  1. Check the continuity of the switch circuit
  2. Inspect contacts for corrosion
  3. Check the condition of the wiring harness in the trunk area
  4. Replace the trunk lock switch if necessary
  5. Clean contacts from corrosion

Related codes

B2107B2109

FAQ

What does the B2108 code mean?

B2108 is an OBD-II diagnostic trouble code that indicates: Trunk Key Cylinder Switch Failure

What causes a B2108 error code?

The most common causes of B2108 include: Open circuit switch; Short circuit; Mechanical damage to the switch; Contact corrosion.

How do I fix a B2108 diagnostic trouble code?

To fix B2108: Check the continuity of the switch circuit. Inspect contacts for corrosion. Check the condition of the wiring harness in the trunk area. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2108?

Yes, but get it checked soon

How much does it cost to fix B2108?

The estimated repair cost for B2108 is $11–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat