OBD Guide
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B12B6

Front Lock Motor Common Circuit Circuit Short

B12B6 is an OBD-II diagnostic trouble code meaning: Front Lock Motor Common Circuit Circuit Short. Common causes: wiring harness damage, front lock motor malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • Front lock malfunction
  • Fault alarm on the instrument panel
  • Problems with central locking

Causes

  • Wiring harness damage
  • Front lock motor malfunction
  • Short circuit in power supply
  • Relay or fuse problems

How to Fix

  1. Check wiring harness for damage
  2. Test the front lock motor
  3. Check power supply and ground
  4. Replace faulty components

Related codes

B12B5B12B7

FAQ

What does the B12B6 code mean?

B12B6 is an OBD-II diagnostic trouble code that indicates: Front Lock Motor Common Circuit Circuit Short

What causes a B12B6 error code?

The most common causes of B12B6 include: Wiring harness damage; Front lock motor malfunction; Short circuit in power supply; Relay or fuse problems.

How do I fix a B12B6 diagnostic trouble code?

To fix B12B6: Check wiring harness for damage. Test the front lock motor. Check power supply and ground. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B12B6?

Limited driving only, diagnose soon

How much does it cost to fix B12B6?

The estimated repair cost for B12B6 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat