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U0138 Lincoln Code - Lost Communication With All Terrain Control Module

Quick Answer

The U0138 diagnostic trouble code (DTC) for Lincoln vehicles indicates that there is a communication problem between the vehicle's engine control module (ECM) and the All Terrain Control Module (ATCM). Common causes include Faulty wiring or connections between the ECM and ATCM, Corrosion or damage to the communication lines, Malfunctioning ECM or ATCM. 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
U0138 Lincoln indicates Lost Communication With All Terrain Control Module.
Common causes
Common causes include Faulty wiring or connections between the ECM and ATCM, Corrosion or damage to the communication lines, Malfunctioning ECM or ATCM.
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 U0138 Lincoln Description

The U0138 diagnostic trouble code (DTC) for Lincoln vehicles indicates that there is a communication problem between the vehicle's engine control module (ECM) and the All Terrain Control Module (ATCM). The ATCM is responsible for managing the vehicle's traction control system, stability control system, and other related functions. When communication is lost between the ECM and ATCM, it can lead to a variety of issues that affect the vehicle's performance, safety, and overall drivability.

OBDII Code U0138 Lincoln - Lost Communication With All Terrain Control Module
U0138 Lincoln Code - Lost Communication With All Terrain Control Module

Common Causes of U0138 Lincoln

  1. Faulty wiring or connections between the ECM and ATCM.
  2. Corrosion or damage to the communication lines.
  3. Malfunctioning ECM or ATCM.
  4. Software issues or programming errors.
  5. Electrical interference or electromagnetic interference.

Symptoms of U0138 Lincoln

  1. Illumination of the traction control, stability control, or ABS warning lights on the dashboard.
  2. Loss of traction control and stability control functionality.
  3. Decreased performance and responsiveness while driving.
  4. Difficulty braking or increased stopping distances.
  5. Harsh shifting or transmission issues.

How to Fix U0138 Lincoln

  1. Begin by conducting a thorough inspection of the wiring harness and connectors between the ECM and ATCM. Repair or replace any damaged or corroded components.
  2. Check for any loose or disconnected connections and ensure they are properly secured.
  3. Use a diagnostic scan tool to reset the DTC and attempt to reestablish communication between the ECM and ATCM.
  4. If communication is still not restored, consider updating the software or reprogramming the ECM and ATCM.
  5. If the issue persists, it may be necessary to replace either the ECM or ATCM, depending on which component is determined to be faulty.

Cost to Fix U0138 Lincoln

The cost of repairing a U0138 code on a Lincoln vehicle can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts for this repair can range from $200 to $800, with labor costs adding an additional $100 to $300. Overall, the total repair cost for addressing a U0138 code typically falls between $300 and $1100. However, it is important to note that labor rates and part prices can vary significantly based on location, vehicle make and model, and the specific repair shop. It is recommended to obtain quotes from multiple repair facilities to ensure a competitive price for the repair.

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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 U0138 Lincoln Code

1. What are the common symptoms of OBDII code U0138 in a Lincoln vehicle?

- Common symptoms include the ABS warning light being illuminated, traction control system malfunctions, and potential loss of communication with the All Terrain Control Module.

2. What are the possible causes of the U0138 code in a Lincoln vehicle?

- The U0138 code typically indicates a communication problem between the vehicle's modules, which could be caused by a faulty All Terrain Control Module, damaged wiring, or a poor electrical connection.

3. How can I diagnose the U0138 code in my Lincoln vehicle?

- Diagnosing the U0138 code involves using a diagnostic scanner to retrieve the trouble codes, checking the communication lines for any damage, and testing the All Terrain Control Module for functionality.

4. Can I still drive my Lincoln with the U0138 code present?

- It is not advisable to drive your Lincoln with the U0138 code present, as it can affect the proper functioning of the traction control system, potentially compromising vehicle safety.

5. How can I repair the U0138 code in my Lincoln vehicle?

- Repairing the U0138 code involves addressing the underlying communication issue, which may require replacing the All Terrain Control Module, repairing damaged wiring, or ensuring proper electrical connections.

6. Is it safe to continue driving if the U0138 code comes on intermittently?

- It is not recommended to continue driving if the U0138 code appears intermittently, as it can indicate an underlying issue that needs to be addressed to maintain the vehicle's safety and performance.

7. Are there any DIY fixes for the U0138 code in a Lincoln vehicle?

- DIY fixes for the U0138 code may include checking and cleaning electrical connections, inspecting wiring for damage, and ensuring proper module installation, but more complex issues may require professional diagnosis and repair.

8. Can a low battery voltage cause the U0138 code in a Lincoln vehicle?

- Yes, a low battery voltage can potentially cause communication issues between modules, leading to the U0138 code in a Lincoln vehicle. It is important to ensure the battery is in good condition.

9. Will resetting the trouble codes make the U0138 code disappear permanently?

- Resetting the trouble codes may temporarily clear the U0138 code, but if the underlying issue causing the communication problem is not addressed, the code is likely to reappear.

10. How much can I expect to pay for professional repairs related to the U0138 code in a Lincoln vehicle?

- The cost of professional repairs for the U0138 code can vary depending on the specific cause of the issue, but it is advisable to budget for diagnostic fees, replacement parts, and labor costs, which can range from a few hundred to over a thousand dollars.

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