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Engine-Codes – Generic – B1393

B1393 Code - Power Door Memory Lock Relay Circuit Open

Quick Answer

The B1393 code indicates a problem with the power door memory lock relay circuit being open. Common causes include Damaged wiring in the power door memory lock relay circuit, Faulty power door memory lock relay, Blown fuse related to the power door memory lock relay circuit. 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
B1393 indicates Power Door Memory Lock Relay Circuit Open.
Common causes
Common causes include Damaged wiring in the power door memory lock relay circuit, Faulty power door memory lock relay, Blown fuse related to the power door memory lock relay circuit.
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 09, 2024
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Code B1393 Description

The B1393 code indicates a problem with the power door memory lock relay circuit being open. In vehicles equipped with power door locks, the power door memory lock relay circuit is responsible for controlling the locking and unlocking of the doors based on the input from the key fob or interior switches. When this circuit is open, it means that there is a break or interruption in the electrical connection, preventing the proper functioning of the power door locks.

OBDII Code B1393 - Power Door Memory Lock Relay Circuit Open
B1393 Code - Power Door Memory Lock Relay Circuit Open

Common Causes of B1393

  1. Damaged wiring in the power door memory lock relay circuit.
  2. Faulty power door memory lock relay.
  3. Blown fuse related to the power door memory lock relay circuit.
  4. Malfunctioning door lock actuator.
  5. Corrosion or poor connection at the relay or wiring terminals.

Symptoms of B1393

  1. Inability to lock or unlock doors using the key fob or interior switches.
  2. Doors locking or unlocking intermittently.
  3. Alarm system not arming or disarming properly.
  4. Interior lights not turning on or off when doors are locked or unlocked.
  5. Battery drain due to constant power drain on the power door memory lock relay circuit.

How to Fix B1393

  1. Diagnose the specific cause of the open circuit using a multimeter to test the continuity of the wiring and components.
  2. Replace any damaged wiring or connectors in the power door memory lock relay circuit.
  3. Replace the faulty power door memory lock relay.
  4. Check and replace any blown fuses related to the circuit.
  5. Test the system to ensure proper functioning of the power door locks.

Cost to Fix B1393

The typical repair costs for addressing a power door memory lock relay circuit open issue can vary depending on the specific cause and the labor rates at the auto repair shop. On average, the cost of parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. Overall, the total repair cost can be between $150 and $500. It is advisable to get a precise estimate from a local auto repair shop based on the vehicle make and model, as well as the specific diagnosis and repair process required.

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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 B1393 Code

1. What are the common symptoms of OBDII code B1393 - Power Door Memory Lock Relay Circuit Open?

- Common symptoms include power door locks not functioning properly, doors not locking or unlocking with the remote, and issues with the power door memory function.

2. What are the possible causes of OBDII code B1393?

- The code B1393 can be caused by a malfunctioning power door lock relay, damaged wiring in the circuit, or a faulty power door lock actuator.

3. How can I diagnose the Power Door Memory Lock Relay Circuit Open issue?

- To diagnose the issue, you can use an OBDII scanner to read the code, visually inspect the wiring and connectors in the circuit, and test the power door lock relay for proper operation.

4. Can a DIY enthusiast repair OBDII code B1393 at home?

- Repairing OBDII code B1393 may be possible for DIY enthusiasts with experience in automotive electrical systems. However, it is recommended to consult a professional mechanic for accurate diagnosis and repair.

5. Are there any quick fixes for OBDII code B1393?

- Quick fixes for code B1393 may include checking and reconnecting any loose wiring connections in the power door lock circuit, ensuring the relay is securely in place, and testing the power door lock system for proper operation.

6. Is it safe to continue driving with OBDII code B1393 active?

- It is generally safe to continue driving with code B1393, but it is important to address the issue promptly to prevent further damage to the power door lock system and ensure the safety and security of the vehicle.

7. How much does it typically cost to repair OBDII code B1393?

- The cost of repairing OBDII code B1393 can vary depending on the underlying cause of the issue, the vehicle make and model, and labor rates. It is advisable to obtain quotes from different mechanics or repair shops.

8. Can weather conditions or external factors trigger OBDII code B1393?

- Extreme weather conditions or exposure to moisture can potentially affect the power door lock circuit and trigger code B1393. It is important to keep the vehicle protected and perform regular maintenance to prevent such issues.

9. Will resetting the OBDII system clear code B1393?

- Resetting the OBDII system may temporarily clear code B1393, but if the underlying issue is not resolved, the code is likely to reappear. It is crucial to diagnose and repair the root cause of the problem.

10. How can I prevent OBDII code B1393 from recurring in the future?

- To prevent code B1393 from recurring, it is essential to maintain the power door lock system, address any wiring or relay issues promptly, and follow the manufacturer's recommended maintenance schedule for the vehicle.

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