OBD Guide
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B12E8

Liftgate/Tailgate Control/Release Switch

B12E8 is an OBD-II diagnostic trouble code meaning: Liftgate/Tailgate Control/Release Switch. Common causes: malfunction of the rear door open button, open or short circuit in wiring harness. Estimated repair cost: $33–111.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–111 (est.)

Symptoms

  • The rear door/trunk does not open with the button
  • Rear door/trunk opens with delay
  • The door open indicator flashes when the door is closed

Causes

  • Malfunction of the rear door open button
  • Open or short circuit in wiring harness
  • Problems with the body control module
  • Mechanical jamming of the lock

How to Fix

  1. Check the operation of the rear door open button
  2. Inspect the wiring harness for damage
  3. Check resistance and continuity of control circuit
  4. Replace faulty switch or wiring
  5. Test the operation of the rear door lock

Related codes

B12E7B12E9

FAQ

What does the B12E8 code mean?

B12E8 is an OBD-II diagnostic trouble code that indicates: Liftgate/Tailgate Control/Release Switch

What causes a B12E8 error code?

The most common causes of B12E8 include: Malfunction of the rear door open button; Open or short circuit in wiring harness; Problems with the body control module; Mechanical jamming of the lock.

How do I fix a B12E8 diagnostic trouble code?

To fix B12E8: Check the operation of the rear door open button. Inspect the wiring harness for damage. Check resistance and continuity of control circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B12E8?

Limited driving only, diagnose soon

How much does it cost to fix B12E8?

The estimated repair cost for B12E8 is $33–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat