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Engine-Codes – Generic – B1320

B1320 Code - Driver Door Ajar Circuit Open

Quick Answer

The B1320 diagnostic trouble code indicates that there is an issue with the driver door ajar circuit being open. Common causes include Faulty driver door ajar sensor, Wiring issues in the driver door circuit, Corrosion or damage to the wiring connections. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
B1320 indicates Driver Door Ajar Circuit Open.
Common causes
Common causes include Faulty driver door ajar sensor, Wiring issues in the driver door circuit, Corrosion or damage to the wiring connections.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code B1320 Description

The B1320 diagnostic trouble code indicates that there is an issue with the driver door ajar circuit being open. This means that the vehicle's computer system is not receiving the proper signal from the driver door sensor, which is responsible for detecting whether the door is open or closed. This can lead to various problems with the vehicle's systems, such as the interior lights staying on when the door is closed, the door not locking properly, or the alarm system malfunctioning.

OBDII Code B1320 - Driver Door Ajar Circuit Open
B1320 Code - Driver Door Ajar Circuit Open

Common Causes of B1320

  1. Faulty driver door ajar sensor.
  2. Wiring issues in the driver door circuit.
  3. Corrosion or damage to the wiring connections.
  4. Faulty vehicle computer system.

Symptoms of B1320

  1. Interior lights staying on even when the door is closed.
  2. Door not locking properly.
  3. Alarm system not functioning correctly.
  4. Warning light on the dashboard indicating a door ajar.

How to Fix B1320

  1. Diagnose the issue by using a scan tool to read the code and test the driver door ajar sensor.
  2. Inspect the wiring in the driver door circuit for any damage or corrosion.
  3. Repair or replace any damaged wiring or connections.
  4. Test the driver door ajar sensor and replace if necessary.
  5. Clear the code from the vehicle's computer system and test to ensure the issue is resolved.

Cost to Fix B1320

The typical repair costs for addressing the B1320 code can vary depending on the specific cause of the issue. Generally, you can expect to pay anywhere from $100 to $300 for parts and labor. However, it's important to note that the cost can be higher if the vehicle requires a new sensor or if there are extensive wiring issues. Additionally, the specific diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate.

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Code B1320 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1320 Code

1. What does the OBDII code B1320 mean?

B1320 indicates an open circuit in the driver door ajar circuit, meaning the system is not detecting the driver door's proper open or closed status.

2. What are the common symptoms of code B1320?

Symptoms include the dome light staying on, door ajar warning light illuminating, alarm system malfunction, or issues with automatic locking.

3. What causes the B1320 code to appear?

Common causes include a faulty door ajar switch, damaged or corroded wiring, a loose electrical connector, or a malfunctioning Body Control Module (BCM).

4. Can I drive my car with the B1320 code?

Yes, you can drive with this code, but it may cause inconvenience, such as battery drainage due to the dome light staying on or safety concerns with auto-lock systems.

5. How can I fix the B1320 code?

Inspect and repair or replace the driver door ajar switch, check wiring for damage or corrosion, and ensure all electrical connectors are secure.

6. How do I diagnose the B1320 code?

Start by scanning for codes, visually inspecting the door ajar switch and wiring, testing the circuit for continuity, and checking BCM data to confirm the fault.

7. What tools are needed to fix the B1320 code?

You'll need a multimeter, a scan tool with live data capability, and basic hand tools to inspect and repair the circuit or switch.

8. Is a faulty Body Control Module (BCM) a common cause of B1320?

A faulty BCM is less common but possible. Rule out wiring and switch issues before considering BCM replacement.

9. How much does it cost to repair the B1320 code?

Repair costs vary but typically range from $50 to $200 for parts and labor, depending on whether the door ajar switch or wiring needs repair.

10. Can I clear the B1320 code without fixing the issue?

You can clear the code with a scan tool, but it will likely return if the underlying problem is not addressed.

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