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Engine-Codes – RAM – U11C6 RAM

U11C6 RAM Code - Lost Engine Torque Request Message

Quick Answer

The U11C6 diagnostic trouble code (DTC) indicates that the Engine Control Module (ECM) has lost communication with the Transmission Control Module (TCM) regarding the engine torque request message. Common causes include Faulty wiring or connectors between ECM and TCM, Malfunctioning ECM or TCM, Software glitch in ECM or TCM. 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
U11C6 RAM indicates Lost Engine Torque Request Message.
Common causes
Common causes include Faulty wiring or connectors between ECM and TCM, Malfunctioning ECM or TCM, Software glitch in ECM or TCM.
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 16, 2024
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Code U11C6 RAM Description

The U11C6 diagnostic trouble code (DTC) indicates that the Engine Control Module (ECM) has lost communication with the Transmission Control Module (TCM) regarding the engine torque request message. This message is crucial for the proper operation of the vehicle, as it informs the TCM of the torque level the engine is currently producing. Without this information, the TCM may not be able to adjust the transmission shifting points correctly, leading to potential drivability issues.

OBDII Code U11C6 RAM - Lost Engine Torque Request Message
U11C6 RAM Code - Lost Engine Torque Request Message

Common Causes of U11C6 RAM

  1. Faulty wiring or connectors between ECM and TCM
  2. Malfunctioning ECM or TCM
  3. Software glitch in ECM or TCM
  4. Communication network problem

Symptoms of U11C6 RAM

  1. Poor acceleration
  2. Rough shifting
  3. Decreased fuel efficiency
  4. Hesitation or jerking during acceleration
  5. Check Engine Light illuminated

How to Fix U11C6 RAM

  1. Perform a thorough inspection of the wiring and connectors between the ECM and TCM to check for any damage or corrosion. Repair or replace as necessary.
  2. Use a diagnostic scan tool to communicate with both the ECM and TCM to determine if there are any software issues. Update or reprogram the modules if required.
  3. Test the communication network between the ECM and TCM to ensure proper connectivity. Repair any faults found in the network.
  4. Clear the DTC and test drive the vehicle to verify that the issue has been resolved. If the code returns, further diagnosis may be needed to pinpoint the exact cause.

Cost to Fix U11C6 RAM

The cost of repairing a U11C6 code can vary depending on the specific cause of the issue. In general, the repair may range from $100 to $500, including parts and labor. However, it is essential to note that diagnostic time and labor rates at auto repair shops can vary significantly. It is recommended to check with local shops for a more accurate estimate based on your vehicle make and model.

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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 U11C6 RAM Code

1. What does the OBDII code U11C6 mean?

U11C6 indicates that the vehicle's Powertrain Control Module (PCM) has lost communication with the Engine Control Module (ECM) regarding the torque request message.

2. What are the common symptoms of the U11C6 code?

Symptoms may include reduced engine performance, a lack of throttle response, engine hesitation, or the illumination of the check engine light.

3. What causes the U11C6 code to appear?

Common causes include faulty wiring or connectors between the PCM and ECM, software issues, a malfunctioning PCM/ECM, or a communication bus failure.

4. Can I drive my vehicle with a U11C6 code?

While the vehicle may still be drivable, reduced performance and responsiveness could pose safety risks. It’s best to diagnose and repair the issue promptly.

5. How do you diagnose the U11C6 code?

Diagnosis involves checking for damaged wiring, loose or corroded connectors, ensuring proper voltage supply to the ECM/PCM, and using a scan tool to monitor communication signals.

6. What are the most common repairs for a U11C6 code?

Repairs may include fixing damaged wiring, cleaning or replacing connectors, reprogramming the ECM/PCM, or replacing a faulty module.

7. Can a weak battery cause the U11C6 code?

Yes, a weak or failing battery can lead to communication issues between modules, potentially triggering the U11C6 code.

8. Is the U11C6 code specific to RAM vehicles?

While U11C6 is commonly associated with RAM vehicles, similar communication-related codes can appear in other makes and models.

9. How much does it cost to fix the U11C6 code?

Repair costs can vary widely, ranging from $50 for minor wiring repairs to over $1,000 if a PCM or ECM replacement is needed.

10. Can updating the software resolve the U11C6 code?

In some cases, a software update for the ECM or PCM can resolve communication issues and clear the U11C6 code.

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