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Engine-Codes – Mercury – B1372 Mercury

B1372 Mercury Code - Left Rear Door Handle Unlock Circuit No Sub Type Information

Quick Answer

The B1372 diagnostic trouble code (DTC) for Mercury vehicles indicates a problem with the left rear door handle unlock circuit. Common causes include Damaged wiring or connectors in the left rear door handle unlock circuit, Faulty door lock actuator in the left rear door, Defective switch for the left rear door handle. 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
B1372 Mercury indicates Left Rear Door Handle Unlock Circuit No Sub Type Information.
Common causes
Common causes include Damaged wiring or connectors in the left rear door handle unlock circuit, Faulty door lock actuator in the left rear door, Defective switch for the left rear door handle.
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 13, 2024
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Code B1372 Mercury Description

The B1372 diagnostic trouble code (DTC) for Mercury vehicles indicates a problem with the left rear door handle unlock circuit. This code specifically points to an issue with the circuit that controls the unlocking mechanism of the left rear door handle. When this code is triggered, it means that the vehicle's onboard computer has detected a fault in the electrical system related to unlocking the left rear door handle.

OBDII Code B1372 Mercury - Left Rear Door Handle Unlock Circuit No Sub Type Information
B1372 Mercury Code - Left Rear Door Handle Unlock Circuit No Sub Type Information

Common Causes of B1372 Mercury

  1. Damaged wiring or connectors in the left rear door handle unlock circuit.
  2. Faulty door lock actuator in the left rear door.
  3. Defective switch for the left rear door handle.
  4. Malfunctioning body control module (BCM) responsible for door locking system.

Symptoms of B1372 Mercury

  1. Left rear door does not unlock when handle is pulled or unlock button is pressed.
  2. Inconsistent unlocking of the left rear door.
  3. Unusual sounds or vibrations when attempting to unlock the left rear door.
  4. Warning light on the dashboard indicating a door lock system malfunction.

How to Fix B1372 Mercury

  1. Begin by conducting a thorough inspection of the left rear door handle unlock circuit, checking for any visible damage to the wiring or connectors.
  2. Test the door lock actuator in the left rear door to determine if it is functioning properly. Replace if necessary.
  3. Inspect and test the switch for the left rear door handle to ensure it is sending the correct signals to the BCM.
  4. If the above steps do not resolve the issue, diagnose the BCM to determine if it is causing the problem. Replace or reprogram as needed.

Cost to Fix B1372 Mercury

The typical repair costs for addressing the B1372 code on a Mercury vehicle can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, parts for this repair could range from $50 to $200, while labor costs may be in the range of $100 to $300. Keep in mind that these are rough estimates, and actual costs can vary based on factors such as the location of the repair shop, the make and model of the vehicle, and the type of engine. It's recommended to obtain quotes from local auto repair shops to get a more accurate cost estimate. Additionally, factors such as diagnosis time and labor rates can impact the final repair bill.

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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 B1372 Mercury Code

1. What are the common symptoms of OBDII code B1372 on a Mercury related to the left rear door handle unlock circuit?

- The common symptoms include difficulty unlocking the left rear door from the outside or inside, and the door may not respond to the central locking system.

2. What are the possible causes of OBDII code B1372 Mercury indicating an issue with the left rear door handle unlock circuit?

- The possible causes may include a faulty door lock actuator, damaged wiring or connectors, a malfunctioning door handle switch, or a problem with the body control module.

3. How can I diagnose the issue causing OBDII code B1372 on my Mercury's left rear door handle unlock circuit?

- You can use a multimeter to test the continuity of the wiring, check the operation of the door lock actuator, inspect the door handle switch for proper functioning, and scan the body control module for any related error codes.

4. Is it safe to continue driving my Mercury with OBDII code B1372 related to the left rear door handle unlock circuit issue?

- It is not recommended to drive the vehicle with this issue, as it can lead to inconvenience and potential safety concerns if the left rear door cannot be unlocked in case of an emergency.

5. Can I repair OBDII code B1372 Mercury related to the left rear door handle unlock circuit issue myself?

- Depending on your level of automotive repair experience, you may be able to repair this issue yourself by following diagnostic steps, replacing faulty components, and clearing the error code with an OBDII scanner.

6. Are there any quick tips for fixing OBDII code B1372 on a Mercury with a left rear door handle unlock circuit issue?

- Quick tips include checking the fuse related to the door locks, ensuring the door handle switch is properly connected, and inspecting for any visible damage to the wiring harness.

7. How much does it typically cost to repair OBDII code B1372 on a Mercury caused by a left rear door handle unlock circuit issue?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from a few hundred dollars for parts and labor if you take it to a mechanic.

8. Will resetting the OBDII system clear the B1372 code related to the left rear door handle unlock circuit on my Mercury?

- Resetting the OBDII system may temporarily clear the code, but it is important to diagnose and fix the underlying issue to prevent the code from reappearing.

9. Can extreme weather conditions affect the operation of the left rear door handle unlock circuit on a Mercury, leading to OBDII code B1372?

- Yes, extreme temperatures or moisture can potentially impact the operation of the door lock components, wiring, or connectors, resulting in the triggering of OBDII code B1372.

10. How long does it usually take to repair OBDII code B1372 Mercury related to the left rear door handle unlock circuit issue?

- The repair time can vary depending on the specific cause of the issue and your experience level, but it may take a few hours to a full day to diagnose and repair the problem effectively.

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