OBD Guide

B259F

Trunk/Liftgate Lock Control Circuit Short To Ground

B259F is an OBD-II diagnostic trouble code meaning: Trunk/Liftgate Lock Control Circuit Short To Ground. Common causes: damage to the wiring harness in the trunk area, short circuit in the lock motor. Estimated repair cost: $6–56.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–56 (est.)

Symptoms

  • Trunk lock not working
  • The trunk does not open with the button/key fob
  • Trunk lock circuit fuse blown

Causes

  • Damage to the wiring harness in the trunk area
  • Short circuit in the lock motor
  • Corrosion of lock connector contacts
  • Body Control Module (BCM) Malfunction

How to Fix

  1. Check the trunk lock circuit fuse
  2. Visually inspect the wiring harness at the trunk hinges for damage.
  3. Check the resistance of the lock motor
  4. Diagnose the control circuit using a multimeter
  5. Clean the contacts of the control circuit connectors

Related codes

FAQ

What does the B259F code mean?

B259F is an OBD-II diagnostic trouble code that indicates: Trunk/Liftgate Lock Control Circuit Short To Ground

What causes a B259F error code?

The most common causes of B259F include: Damage to the wiring harness in the trunk area; Short circuit in the lock motor; Corrosion of lock connector contacts; Body Control Module (BCM) Malfunction.

How do I fix a B259F diagnostic trouble code?

To fix B259F: Check the trunk lock circuit fuse. Visually inspect the wiring harness at the trunk hinges for damage.. Check the resistance of the lock motor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B259F?

Limited driving only, diagnose soon

How much does it cost to fix B259F?

The estimated repair cost for B259F is $6–56. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat