AutoCodes – Ford – U0138 Ford

U0138 Ford Code - Lost Communication With All Terrain Control Module

Quick Answer

The Powertrain Control Module (PCM) continuously monitors the Controller Area Network (CAN) for messages from the All-Terrain Control Module (ATCM). Common causes include Faulty All-Terrain Control Module, All-Terrain Control Module harness is open or shorted, All-Terrain Control Module circuit poor electrical connection. 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 Ford indicates Lost Communication With All Terrain Control Module.
Common causes: Common causes include Faulty All-Terrain Control Module, All-Terrain Control Module harness is open or shorted, All-Terrain Control Module circuit poor electrical connection.
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.

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Code Popularity 5,678

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 31, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0138 Ford Description

The Powertrain Control Module (PCM) continuously monitors the Controller Area Network (CAN) for messages from the All-Terrain Control Module (ATCM). This Diagnostic Trouble Code (DTC) sets when the PCM does not receive the ATCM message within the defined amount of time.

OBDII Code U0138 Ford - Lost Communication With All Terrain Control Module - AutoCodes.com — U0138 Ford Code - Lost Communication With All Terrain Control Module

What does this mean?

What are the Possible Causes of the DTC U0138 Ford?

Faulty All-Terrain Control Module
All-Terrain Control Module harness is open or shorted
All-Terrain Control Module circuit poor electrical connection

How to Fix the DTC U0138 Ford?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U0138 Ford code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the U0138 Ford code?

Need more information on how to fix the U0138 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0138 Ford code diagnosed by a professional: Find a repair shop in your area

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 Ford Code

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

- Common symptoms include the illumination of the Check Engine Light, issues with the traction control system, and difficulty shifting gears.

2. What does the OBDII code U0138 Ford indicate?

- This code indicates a communication problem between the vehicle's main computer and the All Terrain Control Module.

3. What are the possible causes of the U0138 code in a Ford vehicle?

- Possible causes include a faulty All Terrain Control Module, damaged wiring or connectors, a drained battery, or a software glitch.

4. How can I diagnose the U0138 code in my Ford vehicle?

- Diagnosing the U0138 code typically involves using a diagnostic scanner to retrieve the specific fault codes and testing the communication between the main computer and the All Terrain Control Module.

5. Can I still drive my Ford with the U0138 code present?

- It is not recommended to drive the vehicle with the U0138 code present, as it can impact the functionality of the traction control system and other safety features.

6. How can I repair the U0138 code in my Ford vehicle?

- Repairing the U0138 code may involve replacing the All Terrain Control Module, repairing damaged wiring or connectors, ensuring the battery is fully charged, and performing a software update.

7. Is it possible to reset the U0138 code in a Ford vehicle?

- The U0138 code can be reset using a diagnostic scanner after the underlying issue has been diagnosed and resolved.

8. Can a DIY enthusiast fix the U0138 code in a Ford vehicle?

- While some aspects of diagnosing and repairing the U0138 code may be possible for a DIY enthusiast, it is recommended to consult a professional mechanic for an accurate diagnosis and repair.

9. How much does it typically cost to repair the U0138 code in a Ford vehicle?

- The cost of repairing the U0138 code can vary depending on the underlying issue, but it may range from $200 to $800, including parts and labor.

10. Is the U0138 code a common issue in Ford vehicles?

- The U0138 code related to lost communication with the All Terrain Control Module is not extremely common but can occur in Ford vehicles, especially in models equipped with advanced traction control systems.