OBD Guide
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B2666

Liftgate Release Switch Circuit Failure

B2666 is an OBD-II diagnostic trouble code meaning: Liftgate Release Switch Circuit Failure. Common causes: malfunction of the rear door open button, open or short circuit in wiring harness. Estimated repair cost: $22–111.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$22–111 (est.)

Symptoms

  • Rear door release button does not work
  • The back door opens with difficulty or jerks
  • The alarm goes off when you try to open the door

Causes

  • Malfunction of the rear door open button
  • Open or short circuit in wiring harness
  • Poor contact in connectors
  • Damage to the control unit

How to Fix

  1. Check the rear door opener button for mechanical damage.
  2. Check wiring harness for open or short circuit
  3. Clean contacts in connectors
  4. Check the operation of the control unit
  5. Replace faulty components if necessary

Related codes

B2665B2667

FAQ

What does the B2666 code mean?

B2666 is an OBD-II diagnostic trouble code that indicates: Liftgate Release Switch Circuit Failure

What causes a B2666 error code?

The most common causes of B2666 include: Malfunction of the rear door open button; Open or short circuit in wiring harness; Poor contact in connectors; Damage to the control unit.

How do I fix a B2666 diagnostic trouble code?

To fix B2666: Check the rear door opener button for mechanical damage.. Check wiring harness for open or short circuit. Clean contacts in connectors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2666?

Yes, but get it checked soon

How much does it cost to fix B2666?

The estimated repair cost for B2666 is $22–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat