OBD Guide
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B1321

Driver Door Ajar Circuit Short To Battery

B1321 is an OBD-II diagnostic trouble code meaning: Driver Door Ajar Circuit Short To Battery. Common causes: damage to the wiring harness in the doorway, short circuit in the door sensor. Estimated repair cost: $33–111.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–111 (est.)

Symptoms

  • False messages about the driver's door not being closed
  • Alarm going off for no reason
  • Incorrect operation of interior lighting
  • Problems with central locking

Causes

  • Damage to the wiring harness in the doorway
  • Short circuit in the door sensor
  • Connector pin corrosion
  • Body control module (BCM) malfunction

How to Fix

  1. Check the condition of the wiring harness in the doorway
  2. Inspect the sensor contacts and connectors for corrosion
  3. Check the resistance of the door sensor
  4. Check the continuity of the wire circuit using a multimeter
  5. If necessary, replace the sensor or repair the wiring harness

Related codes

B1322B1320

FAQ

What does the B1321 code mean?

B1321 is an OBD-II diagnostic trouble code that indicates: Driver Door Ajar Circuit Short To Battery

What causes a B1321 error code?

The most common causes of B1321 include: Damage to the wiring harness in the doorway; Short circuit in the door sensor; Connector pin corrosion; Body control module (BCM) malfunction.

How do I fix a B1321 diagnostic trouble code?

To fix B1321: Check the condition of the wiring harness in the doorway. Inspect the sensor contacts and connectors for corrosion. Check the resistance of the door sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1321?

Limited driving only, diagnose soon

How much does it cost to fix B1321?

The estimated repair cost for B1321 is $33–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat