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Engine-Codes – Generic – B1394

B1394 Code - Power Door Memory Lock Relay Circuit Short To Battery

Quick Answer

The B1394 diagnostic trouble code indicates a problem with the power door memory lock relay circuit, specifically a short to battery. Common causes include Short circuit in the power door memory lock relay circuit, Faulty power door memory lock relay, Wiring or connector issues in the 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
B1394 indicates Power Door Memory Lock Relay Circuit Short To Battery.
Common causes
Common causes include Short circuit in the power door memory lock relay circuit, Faulty power door memory lock relay, Wiring or connector issues in the 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 10, 2024
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Code B1394 Description

The B1394 diagnostic trouble code indicates a problem with the power door memory lock relay circuit, specifically a short to battery. This means that there is an unintended connection between the power door memory lock relay and the vehicle's battery, causing an electrical malfunction in the system. The power door memory lock relay is responsible for controlling the locking and unlocking of the vehicle's doors, as well as storing and recalling the driver's preferred seat, mirror, and steering wheel settings.

OBDII Code B1394 - Power Door Memory Lock Relay Circuit Short To Battery
B1394 Code - Power Door Memory Lock Relay Circuit Short To Battery

Common Causes of B1394

  1. Short circuit in the power door memory lock relay circuit
  2. Faulty power door memory lock relay
  3. Wiring or connector issues in the circuit
  4. Electrical interference from aftermarket accessories or modifications
  5. Water or moisture damage causing corrosion in the circuit

Symptoms of B1394

  1. Doors not locking or unlocking properly
  2. Inability to save or recall memory settings for seats, mirrors, or steering wheel
  3. Interior lights flickering or not working
  4. Alarm system malfunctioning
  5. Battery drain due to constant power draw from the short circuit

How to Fix B1394

  1. Diagnose the exact location of the short circuit using a multimeter and wiring diagram
  2. Inspect the power door memory lock relay for any signs of damage or malfunction
  3. Repair or replace any damaged wiring or connectors in the circuit
  4. Clear the diagnostic trouble code from the vehicle's computer
  5. Test the power door memory lock relay circuit to ensure proper operation

Cost to Fix B1394

The typical repair costs for addressing a B1394 code related to a power door memory lock relay circuit short to battery can vary depending on the specific vehicle make and model, as well as the extent of the damage. In general, the cost of parts such as a new power door memory lock relay or wiring harness can range from $50 to $200. Labor costs for diagnosing and repairing the issue can add an additional $100 to $300 to the total cost. Therefore, the total repair cost may fall between $150 and $500.

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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 B1394 Code

1. What are common symptoms of OBDII code B1394 (Power Door Memory Lock Relay Circuit Short To Battery)?

- Common symptoms include power door locks not functioning properly, intermittent locking/unlocking, and issues with the power door memory settings.

2. What are possible causes of OBDII code B1394?

- Possible causes include a short to battery in the power door memory lock relay circuit, damaged wiring or connectors, or a faulty power door lock relay.

3. How can I diagnose the issue behind OBDII code B1394?

- Use a scan tool to read the code and check for any related codes. Perform a visual inspection of the wiring and connectors in the power door lock system. Test the power door lock relay and related components for proper function.

4. Can I still drive my vehicle with OBDII code B1394 present?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to avoid potential inconvenience or further damage to the power door lock system.

5. How can I repair OBDII code B1394 myself?

- You can repair this code by locating and repairing the short to battery in the power door memory lock relay circuit. This may involve repairing damaged wiring, replacing connectors, or replacing the power door lock relay.

6. Is it necessary to visit a mechanic for OBDII code B1394?

- While it is possible to address this issue yourself if you have the necessary skills and tools, consulting a mechanic may be beneficial for a more accurate diagnosis and efficient repair.

7. Are there any specific tools required to fix OBDII code B1394?

- Basic tools such as a scan tool for code reading, a multimeter for testing circuits, and common hand tools for accessing components may be needed to diagnose and repair this code.

8. Can weather conditions affect the occurrence of OBDII code B1394?

- Extreme weather conditions, such as exposure to moisture or temperature fluctuations, can potentially contribute to wiring damage or electrical issues that lead to OBDII code B1394.

9. How long does it typically take to repair OBDII code B1394?

- The time required to repair this code can vary depending on the specific issue and your experience level. It may take anywhere from a few hours to a full day to diagnose and repair the problem.

10. Will resetting the OBDII code B1394 fix the issue permanently?

- Simply resetting the code without addressing the underlying cause will not fix the issue permanently. It is important to diagnose the problem, make the necessary repairs, and ensure proper functioning of the power door lock system to prevent the code from reoccurring.

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