OBD Guide
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B1300

Power Door Lock Circuit Failure

B1300 is an OBD-II diagnostic trouble code meaning: Power Door Lock Circuit Failure. Common causes: open or shorted wiring harness, central locking relay malfunction. Estimated repair cost: $22–111.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–111 (est.)

Symptoms

  • Central locks don't work
  • Locks work intermittently
  • Error on the dashboard

Causes

  • Open or shorted wiring harness
  • Central locking relay malfunction
  • Damage to the lock mechanism
  • Problem with the central locking control unit

How to Fix

  1. Check the central locking circuit fuse
  2. Inspect the wiring harness for damage
  3. Check the operation of the central locking relay
  4. Diagnose the lock mechanism for damage
  5. Check the control unit for errors

Related codes

B1301B1302B1303B1304

FAQ

What does the B1300 code mean?

B1300 is an OBD-II diagnostic trouble code that indicates: Power Door Lock Circuit Failure

What causes a B1300 error code?

The most common causes of B1300 include: Open or shorted wiring harness; Central locking relay malfunction; Damage to the lock mechanism; Problem with the central locking control unit.

How do I fix a B1300 diagnostic trouble code?

To fix B1300: Check the central locking circuit fuse. Inspect the wiring harness for damage. Check the operation of the central locking relay. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1300?

Limited driving only, diagnose soon

How much does it cost to fix B1300?

The estimated repair cost for B1300 is $22–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat