AutoCodes – Cadillac – U0255 Cadillac

U0255 Cadillac Code - Lost Communication With Info Display Module

Quick Answer

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Info Display Module, Info Display Module harness is open or shorted, Info Display 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: U0255 Cadillac indicates Lost Communication With Info Display Module.
Common causes: Common causes include Faulty Info Display Module, Info Display Module harness is open or shorted, Info Display 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 691

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 Apr 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0255 Cadillac Description

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. The supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Info Display Module has not been received.

OBDII Code U0255 Cadillac - Lost Communication With Info Display Module - AutoCodes.com — U0255 Cadillac Code - Lost Communication With Info Display Module

What does this mean?

What are the Possible Causes of the DTC U0255 Cadillac?

Faulty Info Display Module
Info Display Module harness is open or shorted
Info Display Module circuit poor electrical connection

How to Fix the DTC U0255 Cadillac?

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 U0255 Cadillac 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 U0255 Cadillac Code

1. What are common symptoms of OBDII code U0255 in a Cadillac related to the Info Display Module?

- Common symptoms include a blank or frozen display screen, loss of audio system functionality, and issues with climate control settings.

2. What are possible causes of the U0255 code indicating lost communication with the Info Display Module in a Cadillac?

- Possible causes include a faulty Info Display Module, damaged wiring or connectors, software glitches, or issues with the vehicle's network communication system.

3. How can I diagnose the U0255 code in my Cadillac related to the Info Display Module?

- Diagnosing the U0255 code involves checking the connections to the Info Display Module, inspecting the wiring for damage, and using a diagnostic scanner to communicate with the module.

4. Can I still drive my Cadillac with the U0255 code present indicating lost communication with the Info Display Module?

- In most cases, it is safe to drive the vehicle with the U0255 code, but you may experience a lack of functionality from the Info Display Module until the issue is resolved.

5. How can I repair the U0255 code in my Cadillac if it is related to the Info Display Module?

- Repair options include resetting the module, checking and repairing any damaged wiring, updating software if applicable, or replacing the Info Display Module if necessary.

6. Is the U0255 code in a Cadillac related to the Info Display Module a common issue?

- The U0255 code related to the Info Display Module is not extremely common, but it can occur due to various factors, including component failure or network communication problems.

7. Can a DIY enthusiast fix the U0255 code related to the Info Display Module in a Cadillac?

- Depending on the root cause, some DIY enthusiasts may be able to address the U0255 code by checking connections and wiring. However, more complex issues may require professional diagnosis and repair.

8. Will resetting the OBDII system clear the U0255 code indicating lost communication with the Info Display Module in a Cadillac?

- Resetting the OBDII system may temporarily clear the code, but it is important to diagnose and address the underlying issue to prevent the code from reappearing.

9. How long does it typically take to repair the U0255 code related to the Info Display Module in a Cadillac?

- The repair time for the U0255 code can vary depending on the cause. Simple fixes like resetting the module may only take a few minutes, while more involved repairs could take several hours.

10. Are there any preventive measures to avoid encountering the U0255 code in a Cadillac due to the Info Display Module?

- Regularly checking the functionality of the Info Display Module, keeping the vehicle's software up to date, and ensuring proper maintenance of the electrical system can help prevent issues that trigger the U0255 code.