U0138 Mercury 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 Mercury 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.
Code U0138 Mercury Description
What are the Possible Causes of the DTC U0138 Mercury?
- 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 Mercury?
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 Mercury 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.
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Frequently Asked Questions about U0138 Mercury Code
1. What are common symptoms of OBDII code U0138 "Lost Communication With All Terrain Control Module" in a Mercury?
- Common symptoms include the ABS warning light or traction control light illuminating on the dashboard, loss of traction control functionality, and potential difficulty in shifting gears.
2. What are the possible causes of U0138 code in a Mercury?
- The U0138 code can be triggered by issues such as damaged wiring or connectors, a faulty All Terrain Control Module, a software glitch, or a communication bus problem within the vehicle.
3. How can I diagnose the U0138 code in my Mercury?
- Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the wiring and connectors related to the All Terrain Control Module, and checking for any other related fault codes.
4. Can I continue driving my Mercury with the U0138 code present?
- It is not recommended to drive your Mercury with the U0138 code active, as it can affect the vehicle's traction control system and potentially compromise safety.
5. How can I repair the U0138 code in my Mercury?
- Repairing the U0138 code may involve fixing any damaged wiring or connectors, replacing the All Terrain Control Module if necessary, and clearing the code with the OBDII scanner.
6. Is it possible to reset the U0138 code in a Mercury without fixing the underlying issue?
- While you can clear the code with an OBDII scanner, it will likely return if the root cause of the communication error with the All Terrain Control Module is not addressed.
7. Will the U0138 code cause my Mercury to fail an emissions test?
- The U0138 code itself may not directly cause your Mercury to fail an emissions test, but it indicates a problem that should be fixed to ensure the vehicle's overall performance and emissions compliance.
8. Can extreme weather conditions trigger the U0138 code in a Mercury?
- Extreme weather conditions such as excessive heat or cold can potentially affect the All Terrain Control Module and lead to a communication error triggering the U0138 code.
9. How long does it take to repair the U0138 code in a Mercury?
- The time to repair the U0138 code can vary depending on the specific cause of the issue, but it may take a few hours to a day for diagnosis, parts replacement, and clearing the code.
10. Should I attempt to fix the U0138 code in my Mercury myself, or seek professional help?
- It is recommended to seek professional help from a qualified mechanic or dealership to diagnose and repair the U0138 code, as it involves complex electrical systems that require specialized knowledge and tools.
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