AutoCodes – RAM – U11F5 RAM

U11F5 RAM Code - Lost Communication With Compact Disc Module

Quick Answer

The primary communication network between electronic control modules is the Controller Area Network (CAN) data bus system. Common causes include Faulty External Disc Module (EDM), External Disc Module harness is open or shorted, External Disc 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: U11F5 RAM indicates Lost Communication With Compact Disc Module.
Common causes: Common causes include Faulty External Disc Module (EDM), External Disc Module harness is open or shorted, External Disc 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 897

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 U11F5 RAM Description

The primary communication network between electronic control modules is the Controller Area Network (CAN) data bus system. The Controller Area Network (CAN) data bus allows all electronic modules connected to the bus to share information with each other. Regardless of whether a message originates from a module on the higher speed CAN C (500K) Bus or on the lower speed bus, CAN Interior High Speed (IHS) (125K) Bus, the message structure and layout is similar, which allows the Body Control Module (BCM) to process and transfer messages between the CAN buses. The BCM stores Diagnostic Trouble Codes (DTCs) for certain bus network faults on the CAN C (500K) Bus and CAN IHS (125K) Bus.
The Diagnostic Trouble Code (DTC) sets when the Bus messages not received from the External Disc Module (EDM) for approximately ten seconds.

OBDII Code U11F5 RAM - Lost Communication With Compact Disc Module - AutoCodes.com — U11F5 RAM Code - Lost Communication With Compact Disc Module

What does this mean?

What are the Possible Causes of the DTC U11F5 RAM?

Faulty External Disc Module (EDM)
External Disc Module harness is open or shorted
External Disc Module circuit poor electrical connection

How to Fix the DTC U11F5 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 U11F5 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 U11F5 RAM Code

1. What are the common symptoms of the OBDII code U11F5 RAM "Lost Communication With Compact Disc Module"?

- Common symptoms include issues with the vehicle's CD player, radio functionality, and overall entertainment system.

2. What are possible causes of the U11F5 RAM code?

- Possible causes of this code include a faulty CD module, loose or damaged wiring connections, or a malfunctioning communication network within the vehicle.

3. How can I diagnose the U11F5 RAM code related to the CD module communication issue?

- Diagnosis typically involves checking the wiring connections to the CD module, inspecting for any physical damage, and using a diagnostic scanner to identify communication errors.

4. Is it safe to continue driving with the U11F5 RAM code present?

- While the vehicle may still be operational, it is recommended to address the communication issue promptly to prevent further damage to the entertainment system or potential electrical issues.

5. Can I repair the U11F5 RAM code issue on my own?

- Depending on your level of automotive expertise, you may be able to address the issue by checking and repairing wiring connections or replacing the CD module yourself. However, consulting a professional technician is advisable for accurate diagnosis and repair.

6. Are there any troubleshooting tips for resolving the U11F5 RAM code?

- Troubleshooting tips include checking fuse connections related to the entertainment system, resetting the vehicle's computer system, and ensuring all multimedia components are functioning properly.

7. How much does it typically cost to repair the U11F5 RAM code issue?

- Repair costs can vary depending on the specific cause of the communication problem. Costs may range from a simple wiring repair to replacing the CD module, with labor charges also factoring into the total cost.

8. Will resetting the OBDII code U11F5 RAM resolve the communication issue?

- Resetting the code may temporarily clear the error, but it is essential to address the root cause of the communication problem to prevent the code from reoccurring.

9. Can the U11F5 RAM code affect other vehicle systems besides the CD module?

- While the code specifically relates to communication issues with the CD module, underlying network communication problems may potentially impact other vehicle systems connected to the same network.

10. How can I prevent the U11F5 RAM code from appearing in the future?

- To prevent the U11F5 RAM code from reoccurring, regularly inspect and maintain the vehicle's entertainment system components, including the CD module and associated wiring connections.