AutoCodes – Buick – U0255 Buick

U0255 Buick 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 Buick 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 1,111

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

What does this mean?

What are the Possible Causes of the DTC U0255 Buick?

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 Buick?

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 Buick 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 Buick Code

1. What does the OBDII code U0255 mean on a Buick?

U0255 indicates that the vehicle's control modules have lost communication with the Info Display Module, which manages information shown on the display screen.

2. What are common symptoms of the U0255 code in a Buick?

Symptoms may include a blank or non-functional display screen, failure of infotainment or navigation systems, and possibly unresponsive controls on the dashboard.

3. What causes the U0255 code to trigger in a Buick?

Common causes include a faulty Info Display Module, damaged wiring or connectors, a blown fuse, or network communication issues within the vehicle's CAN bus system.

4. Can a weak battery cause the U0255 code in a Buick?

Yes, a weak or failing battery can cause disruptions in communication between modules, potentially triggering the U0255 code.

5. How do you diagnose the U0255 code on a Buick?

Diagnosis includes checking the Info Display Module for faults, inspecting wiring and connectors for damage, verifying power and ground connections, and using a scan tool to monitor CAN bus communication.

6. Is it safe to drive a Buick with the U0255 code?

While the vehicle may still be drivable, the loss of the Info Display Module can affect access to important information or controls, so itâ€™s advisable to address the issue promptly.

7. How can a U0255 code be fixed on a Buick?

Repairs may include reconnecting loose connectors, repairing damaged wiring, replacing a faulty Info Display Module, or updating the module's software.

8. Do I need to reprogram the Info Display Module after replacing it for a U0255 code?

In many cases, replacing the Info Display Module will require reprogramming or module initialization using a professional scan tool.

9. Can the U0255 code be cleared without repairing the issue in a Buick?

Clearing the code without addressing the root cause may temporarily remove it, but itâ€™s likely to return until the underlying issue is resolved.

10. How much does it cost to repair the U0255 code on a Buick?

Repair costs vary depending on the specific issue, but replacing an Info Display Module can range from $300 to $1,000, including parts and labor. Wiring repairs or software updates may be less expensive.