AutoCodes – RAM – U11E4 RAM

U11E4 RAM Code - CAN Communication Message Missing

Quick Answer

The purpose of the diagnostic is to monitor the Controller Area Network (CAN) BUS, the transmitted messages on the CAN BUS and the validity of the CAN signals. Common causes include Faulty Body Control Module (BCM), Faulty Powertrain Control Module (PCM), Faulty Transmission Control Module (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: U11E4 RAM indicates CAN Communication Message Missing.
Common causes: Common causes include Faulty Body Control Module (BCM), Faulty Powertrain Control Module (PCM), Faulty Transmission Control Module (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.

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Code Popularity 1,568

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 May 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U11E4 RAM Description

The purpose of the diagnostic is to monitor the Controller Area Network (CAN) BUS, the transmitted messages on the CAN BUS and the validity of the CAN signals. Several control units are connected to the CAN bus which send their messages cyclically in a defined time window. The messages contain multiple signals representing vehicle information. The Diagnostic Trouble Code (DTC) sets when the received Data Length Code (DLC) is smaller than the specified length of the message or the content of the message was changed during Transmission.

OBDII Code U11E4 RAM - CAN Communication Message Missing - AutoCodes.com — U11E4 RAM Code - CAN Communication Message Missing

What does this mean?

What are the Possible Causes of the DTC U11E4 RAM?

Faulty Body Control Module (BCM)
Faulty Powertrain Control Module (PCM)
Faulty Transmission Control Module (TCM)

How to Fix the DTC U11E4 RAM?

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 U11E4 RAM 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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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 U11E4 RAM Code

1. What are the common symptoms of OBDII code U11E4 RAM titled CAN Communication Message Missing?

The common symptoms include issues with the vehicle's communication systems, such as difficulty starting the car, intermittent or complete loss of power steering, and warning lights on the dashboard.

2. What are some possible causes of OBDII code U11E4 RAM?

Possible causes of this code include faulty wiring or connectors in the Controller Area Network (CAN) communication system, a malfunctioning CAN bus module, or a problem with the vehicle's powertrain control module (PCM).

3. How can I diagnose the OBDII code U11E4 RAM?

Diagnosing this code typically involves using a professional OBDII scanner to retrieve the code and then checking the CAN communication system components for any visible damage or loose connections. It may also require conducting a thorough inspection of the wiring harness and connectors.

4. What are some repair tips for fixing OBDII code U11E4 RAM?

Repair tips for this code may include repairing or replacing damaged wiring or connectors in the CAN system, ensuring proper grounding of the components, and updating the vehicle's software if necessary. A professional technician may be needed for more complex repairs.

5. Can OBDII code U11E4 RAM cause other issues with the vehicle?

Yes, if left unresolved, this code can lead to further communication problems within the vehicle's systems, potentially affecting the overall performance and safety features of the vehicle.

6. Is it safe to continue driving with OBDII code U11E4 RAM present?

It is not recommended to continue driving with this code present, as it can cause intermittent or complete loss of critical vehicle functions like power steering, which can compromise safety on the road.

7. How much does it typically cost to repair OBDII code U11E4 RAM?

The cost of repairing this code can vary depending on the extent of the issue and the specific components that need to be repaired or replaced. It is advisable to consult a professional technician for an accurate estimate.

8. Can resetting the OBDII code U11E4 RAM resolve the issue temporarily?

Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the communication message missing. It is essential to diagnose and address the root cause of the problem.

9. Can extreme weather conditions contribute to triggering OBDII code U11E4 RAM?

Extreme weather conditions, such as extreme cold or heat, can potentially affect the vehicle's electrical components and communication systems, leading to the triggering of this code.

10. Are there any preventative measures to avoid encountering OBDII code U11E4 RAM in the future?

Regular maintenance checks, including inspecting the wiring and connectors in the CAN system, ensuring proper grounding, and keeping the vehicle's software up to date, can help prevent the occurrence of this code in the future.