AutoCodes – Generic – U11E4

U11E4 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 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 4,418

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

What does this mean?

What are the Possible Causes of the DTC U11E4?

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

How to Fix the DTC U11E4?

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 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 U11E4 code?

Need more information on how to fix the U11E4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U11E4 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U11E4 Chrysler — CAN Communication Message Missing
U11E4 Dodge — CAN Communication Message Missing
U11E4 Fiat — CAN Communication Message Missing
U11E4 Jeep — CAN Communication Message Missing
U11E4 RAM — CAN Communication Message Missing

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 Code

1. What are common symptoms of OBDII code U11E4 (CAN Communication Message Missing)?

- Common symptoms include issues with the vehicle's communication system, such as dashboard warning lights, erratic behavior of electronic components, and potential drivability issues.

2. What could cause the OBDII code U11E4 to occur?

- The code U11E4 can be triggered by a fault in the Controller Area Network (CAN) communication system, which may be caused by damaged wiring, loose connections, or a malfunctioning control module.

3. How can I diagnose the cause of OBDII code U11E4?

- Diagnosing the cause of U11E4 involves using a professional OBDII scanner to retrieve the code, checking the communication system's wiring and connections for damage or looseness, and testing the control modules for proper functionality.

4. Are there any repair tips for fixing OBDII code U11E4?

- Repairing U11E4 may involve repairing or replacing damaged wiring, securing loose connections, or replacing faulty control modules. It is recommended to follow manufacturer-specific diagnostic and repair procedures.

5. Can OBDII code U11E4 be cleared/reset, or does it require immediate repair?

- While the code can be cleared/reset using an OBDII scanner, it is important to address the underlying cause of U11E4 to prevent further communication issues and ensure the vehicle's systems operate correctly.

6. Is OBDII code U11E4 a serious issue that requires immediate attention?

- U11E4 indicates a communication problem within the vehicle's systems, which can potentially lead to functionality issues. It is recommended to address the code promptly to avoid further complications.

7. How does OBDII code U11E4 affect the vehicle's performance?

- OBDII code U11E4 can affect the vehicle's performance by causing communication errors between control modules, resulting in warning lights, erratic behavior of electronic components, and potential drivability issues.

8. Can a DIY enthusiast repair OBDII code U11E4, or is professional assistance necessary?

- While some DIY enthusiasts may have the skills to diagnose and repair U11E4, it is recommended to seek professional assistance, especially when dealing with complex communication system issues and control modules.

9. Are there any known recalls or technical service bulletins related to OBDII code U11E4?

- It is advisable to check with the vehicle manufacturer or authorized dealerships for any recalls or technical service bulletins related to OBDII code U11E4, as they may provide relevant information or solutions.

10. How can regular maintenance help prevent OBDII code U11E4 from occurring?

- Regular maintenance, including inspecting and maintaining the vehicle's electrical connections, wiring harnesses, and control modules, can help prevent issues like OBDII code U11E4 by ensuring the communication system functions properly.