OBD Guide
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B1329

Passenger Door Ajar Circuit Short To Battery

B1329 is an OBD-II diagnostic trouble code meaning: Passenger Door Ajar Circuit Short To Battery. Common causes: wiring harness short circuit to +12v, damage to the door sensor. Estimated repair cost: $56–167.

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

Symptoms

  • False passenger door open warning
  • Incorrect operation of interior lighting
  • Door lock problems
  • Error indication on the dashboard

Causes

  • Wiring harness short circuit to +12V
  • Damage to the door sensor
  • Corrosion of sensor connector contacts
  • Damage to wire insulation
  • Body Control Module (BCM) Malfunction

How to Fix

  1. Check the integrity of the passenger door wiring harness
  2. Inspect the sensor and BCM connectors for corrosion.
  3. Check the resistance of the door sensor
  4. Replace damaged wires or sensor
  5. Clean the connector contacts
  6. Check operation after repair

Related codes

B1325B1326B1328B1330

FAQ

What does the B1329 code mean?

B1329 is an OBD-II diagnostic trouble code that indicates: Passenger Door Ajar Circuit Short To Battery

What causes a B1329 error code?

The most common causes of B1329 include: Wiring harness short circuit to +12V; Damage to the door sensor; Corrosion of sensor connector contacts; Damage to wire insulation.

How do I fix a B1329 diagnostic trouble code?

To fix B1329: Check the integrity of the passenger door wiring harness. Inspect the sensor and BCM 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 B1329?

Limited driving only, diagnose soon

How much does it cost to fix B1329?

The estimated repair cost for B1329 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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