AutoCodes – Buick – U0254 Buick

U0254 Buick Code - Lost Communication With Remote Start 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 Remote Start Module, Remote Start Module harness is open or shorted, Remote Start 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: U0254 Buick indicates Lost Communication With Remote Start Module.
Common causes: Common causes include Faulty Remote Start Module, Remote Start Module harness is open or shorted, Remote Start 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 999

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 U0254 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 Remote Start Module has not been received.

OBDII Code U0254 Buick - Lost Communication With Remote Start Module - AutoCodes.com — U0254 Buick Code - Lost Communication With Remote Start Module

What does this mean?

What are the Possible Causes of the DTC U0254 Buick?

Faulty Remote Start Module
Remote Start Module harness is open or shorted
Remote Start Module circuit poor electrical connection

How to Fix the DTC U0254 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 U0254 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 U0254 Buick Code

1. What are the common symptoms of OBDII code U0254 in a Buick related to lost communication with the remote start module?

- Common symptoms include the remote start system not working, the vehicle's engine not starting remotely, and error messages related to remote start functionality on the dashboard.

2. What are some possible causes of the U0254 code indicating lost communication with the remote start module in a Buick?

- Possible causes may include a faulty remote start module, wiring or connection issues between the module and the vehicle's computer, or a malfunction in the vehicle's computer system.

3. How can I diagnose the U0254 code in my Buick if I suspect a problem with the remote start module communication?

- Diagnosing the issue may involve checking the connections between the remote start module and the vehicle's computer, inspecting the wiring for any damage, and using a diagnostic tool to scan for specific error codes.

4. Is it safe to continue driving my Buick with the U0254 code related to lost communication with the remote start module?

- While the vehicle may still be safe to drive, it is recommended to address the issue promptly to prevent any potential problems with the remote start system or other related functions.

5. Can I repair the U0254 code in my Buick related to the remote start module communication issue myself, or should I seek professional help?

- Repairing the issue may require advanced diagnostic tools and knowledge of automotive electronics, so it is generally recommended to seek assistance from a qualified mechanic or dealership.

6. Are there any specific repair tips for resolving the U0254 code indicating lost communication with the remote start module in a Buick?

- Repair tips may include checking and securing the connections, ensuring proper power supply to the remote start module, and resetting the system to see if the communication is restored.

7. Will resetting the vehicle's computer system clear the U0254 code related to the remote start module communication problem?

- Resetting the computer system may temporarily clear the code, but if the underlying issue with communication persists, the code is likely to return until the problem is properly addressed.

8. How much can I expect to pay for repairing the U0254 code in my Buick caused by lost communication with the remote start module?

- Repair costs can vary depending on the exact cause of the issue, but it is advisable to budget for diagnostic fees, potential parts replacement, and labor costs associated with troubleshooting and repairing the problem.

9. Can extreme weather conditions or environmental factors contribute to triggering the U0254 code related to lost communication with the remote start module in a Buick?

- Extreme temperatures, moisture, or other environmental factors can sometimes impact the communication between the remote start module and the vehicle's computer, potentially leading to the U0254 code.

10. How can I prevent future occurrences of the U0254 code indicating lost communication with the remote start module in my Buick?

- To prevent future communication issues, it is advisable to regularly inspect the connections, keep the remote start module clean and dry, and address any warning signs promptly to maintain the system's functionality.