OBD Guide

B3138

All Door Lock Circuit High

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • All door locks do not work
  • Locks operate spontaneously
  • The lock button light does not light up

Causes

  • Short circuit in wiring harness
  • Body control module malfunction
  • Problems with lock relays
  • Oxidation of contacts

How to Fix

  1. Check the lock circuit fuses
  2. Inspect the wiring harness for damage
  3. Check the operation of the lock relay
  4. Scan the body control module for errors

Related codes

Error B3138 by Vehicle Brand