OBD Guide

B3135

All Doors Lock Circuit

B3135 is an OBD-II diagnostic trouble code meaning: All Doors Lock Circuit. Common causes: open or short circuit in wiring harness, malfunction of door lock solenoids. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Central locks don't work
  • Doors do not lock/unlock
  • Hazard warning light flashes when attempting to lock

Causes

  • Open or short circuit in wiring harness
  • Malfunction of door lock solenoids
  • Body Control Module (BCM) Problems
  • Contact corrosion
  • Mechanical damage to system elements

How to Fix

  1. Check the wiring harness for opens and shorts
  2. Check the operation of the door lock solenoids
  3. Diagnose Body Control Module (BCM)
  4. Clean contacts from corrosion
  5. Replace damaged system elements

Related codes

Error B3135 by Vehicle Brand

FAQ

What does the B3135 code mean?

B3135 is an OBD-II diagnostic trouble code that indicates: All Doors Lock Circuit

What causes a B3135 error code?

The most common causes of B3135 include: Open or short circuit in wiring harness; Malfunction of door lock solenoids; Body Control Module (BCM) Problems; Contact corrosion.

How do I fix a B3135 diagnostic trouble code?

To fix B3135: Check the wiring harness for opens and shorts. Check the operation of the door lock solenoids. Diagnose Body Control Module (BCM). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B3135?

Limited driving only, diagnose soon

How much does it cost to fix B3135?

The estimated repair cost for B3135 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat