OBD Guide
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B186D

Trunk Release Switch Stuck

B186D is an OBD-II diagnostic trouble code meaning: Trunk Release Switch Stuck. Common causes: mechanical button sticking, short circuit in wiring harness. Estimated repair cost: $22–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$22–89 (est.)

Symptoms

  • Trunk won't open with button
  • The trunk opens spontaneously
  • Fault indication on the instrument panel

Causes

  • Mechanical button sticking
  • Short circuit in wiring harness
  • Open circuit switch
  • Body Control Module (BCM) Malfunction

How to Fix

  1. Check the mechanical condition of the trunk release button
  2. Check the integrity of the wiring harness to the switch
  3. Measure the resistance of the switch in different positions
  4. If necessary, replace the switch or repair the wiring
  5. Reset the error with an OBD-II scanner after repair

Related codes

B186CB186E

FAQ

What does the B186D code mean?

B186D is an OBD-II diagnostic trouble code that indicates: Trunk Release Switch Stuck

What causes a B186D error code?

The most common causes of B186D include: Mechanical button sticking; Short circuit in wiring harness; Open circuit switch; Body Control Module (BCM) Malfunction.

How do I fix a B186D diagnostic trouble code?

To fix B186D: Check the mechanical condition of the trunk release button. Check the integrity of the wiring harness to the switch. Measure the resistance of the switch in different positions. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B186D?

Yes, but get it checked soon

How much does it cost to fix B186D?

The estimated repair cost for B186D is $22–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat