Engine-CodesMercury – U0137 Mercury

U0137 Mercury Code - Lost Communication With Trailer Brake Control Module

Quick Answer

The U0137 code for Mercury vehicles indicates that there is a communication error between the vehicle's onboard computer system and the trailer brake control module. Common causes include Corroded or damaged wiring connections between the vehicle and the trailer brake control module, Faulty trailer brake control module, CAN bus communication issues. 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
U0137 Mercury indicates Lost Communication With Trailer Brake Control Module.
Common causes
Common causes include Corroded or damaged wiring connections between the vehicle and the trailer brake control module, Faulty trailer brake control module, CAN bus communication issues.
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.
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code U0137 Mercury Description

The U0137 code for Mercury vehicles indicates that there is a communication error between the vehicle's onboard computer system and the trailer brake control module. The trailer brake control module is responsible for managing the brakes on a trailer that is attached to the vehicle. When communication is lost with this module, it can lead to issues with the trailer brake system, potentially affecting the vehicle's towing capabilities and overall safety.

OBDII Code U0137 Mercury - Lost Communication With Trailer Brake Control Module
U0137 Mercury Code - Lost Communication With Trailer Brake Control Module

Common Causes of U0137 Mercury

  1. Corroded or damaged wiring connections between the vehicle and the trailer brake control module
  2. Faulty trailer brake control module
  3. CAN bus communication issues
  4. Software glitches in the vehicle's computer system
  5. Electrical interference from aftermarket accessories or modifications

Symptoms of U0137 Mercury

  1. Trailer brakes not engaging properly
  2. ABS (Anti-lock Braking System) warning light illuminated on the dashboard
  3. Inability to adjust trailer brake settings from the vehicle's controls
  4. Erratic trailer brake behavior while towing
  5. Loss of trailer brake functionality altogether

How to Fix U0137 Mercury

  1. Perform a thorough inspection of the wiring connections between the vehicle and the trailer brake control module
  2. Check for any visible signs of damage or corrosion and repair or replace any affected wiring
  3. Test the trailer brake control module for functionality and replace if necessary
  4. Verify proper communication on the CAN bus system and address any faults
  5. Clear the diagnostic trouble codes and test the trailer brake system for proper operation

Cost to Fix U0137 Mercury

The cost of repairing a lost communication issue with the trailer brake control module in a Mercury vehicle can vary depending on the specific cause of the problem. On average, the repair costs can range from $200 to $500, including parts and labor. However, it's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's recommended to check with local shops for a more accurate estimate.

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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 U0137 Mercury Code

1. What are common symptoms of the U0137 OBDII code related to the Trailer Brake Control Module?

- Common symptoms include a malfunction indicator light (MIL) illuminated on the dashboard, loss of communication with the trailer brake control module, and potential issues with trailer brake functionality.

2. What are some possible causes of the U0137 OBDII code in a Mercury vehicle?

- Possible causes of the U0137 code include a faulty trailer brake control module, damaged wiring or connectors, a software glitch, or a communication network issue within the vehicle.

3. How can I diagnose the U0137 code in my Mercury for a lost communication with the trailer brake control module?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific code, checking for any related codes or issues, inspecting the trailer brake control module and its connections, and testing the communication network for faults.

4. Can I still drive my Mercury with the U0137 code present?

- It is generally not recommended to drive with the U0137 code present, as it may indicate a potential safety issue with the trailer brake system. It is best to have the issue diagnosed and repaired as soon as possible.

5. How can I repair the U0137 code related to a lost communication with the trailer brake control module?

- Repair methods may include replacing the trailer brake control module, repairing or replacing damaged wiring or connectors, updating software if necessary, and ensuring proper communication network functionality.

6. Is it possible to reset the U0137 code in a Mercury without repairing the issue?

- While clearing the code with an OBDII scanner may temporarily turn off the MIL, the underlying issue causing the U0137 code will likely persist. It is important to address the root cause of the problem to prevent future occurrences.

7. Can a DIY enthusiast fix the U0137 code issue on a Mercury, or is professional help recommended?

- Depending on the individual's level of expertise and access to tools, some DIY enthusiasts may be able to diagnose and repair the U0137 code. However, due to the complexity of electronic systems, professional help is often recommended for accurate diagnosis and repair.

8. How much does it typically cost to repair the U0137 code in a Mercury at a dealership or auto repair shop?

- Repair costs for the U0137 code can vary depending on the specific cause of the issue, parts needed for replacement, and labor rates. It is advisable to obtain estimates from different sources to compare prices before proceeding with the repair.

9. Are there any preventive maintenance steps I can take to avoid encountering the U0137 code in my Mercury?

- Regularly inspecting and maintaining the trailer brake control module, ensuring proper wiring connections, and keeping the vehicle's communication network in good condition can help prevent issues that may trigger the U0137 code.

10. Will fixing the U0137 code related to the trailer brake control module affect the safety of towing a trailer with my Mercury?

- Addressing the U0137 code promptly and ensuring the trailer brake system functions properly is crucial for safe towing. Once the issue is repaired, it is recommended to test the trailer brake functionality to ensure safe towing practices.

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