Engine-Codes.com
Engine-Codes – Chevrolet – U1255 Chevrolet

U1255 Chevrolet Code - Lost Communications

Quick Answer

The U1255 code for Chevrolet indicates a communication error between different control modules within the vehicle. Common causes include Faulty wiring or connectors between control modules, Malfunctioning control module (BCM, PCM, TCM, etc.), Software glitch in one of the control modules. 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
U1255 Chevrolet indicates Lost Communications.
Common causes
Common causes include Faulty wiring or connectors between control modules, Malfunctioning control module (BCM, PCM, TCM, etc.), Software glitch in one of the control modules.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code U1255 Chevrolet Description

The U1255 code for Chevrolet indicates a communication error between different control modules within the vehicle. This can include issues with the body control module (BCM), powertrain control module (PCM), transmission control module (TCM), or any other electronic control unit (ECU) in the vehicle. When communication is lost between these modules, it can lead to various performance issues and malfunctions in the vehicle.

OBDII Code U1255 Chevrolet - Lost Communications
U1255 Chevrolet Code - Lost Communications

Common Causes of U1255 Chevrolet

  1. Faulty wiring or connectors between control modules
  2. Malfunctioning control module (BCM, PCM, TCM, etc.)
  3. Software glitch in one of the control modules
  4. Power supply issue affecting communication signals
  5. Corrosion or damage to communication circuits

Symptoms of U1255 Chevrolet

  1. Check Engine Light or other warning lights illuminated on the dashboard
  2. Erratic engine performance, such as rough idling or stalling
  3. Transmission shifting irregularly or harshly
  4. ABS system malfunctioning or not working properly
  5. HVAC system not responding to controls

How to Fix U1255 Chevrolet

  1. Perform a thorough inspection of wiring and connectors for any damage or corrosion.
  2. Check and reset all control modules to ensure proper communication.
  3. Update software in control modules to the latest version, if available.
  4. Test power supply to control modules and repair any issues found.
  5. Clear the U1255 code and perform a test drive to confirm proper communication between modules.

Cost to Fix U1255 Chevrolet

The typical repair costs for addressing a U1255 code can vary depending on the specific cause of the issue. In general, the cost for this repair can range from $100 to $500, including parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on your vehicle make and model.

What does this mean?

Tech Notes for U1255 Chevrolet

The code is set when the Powertrain Control Module (PCM) does not receive a message that it was expecting from another control module (e.g. Transmission Control Module, ABS Module), and does not know which control module did not send the message.



As with all loss of communication concerns, inspect the power, ground, and serial data circuits to the suspect module prior to replacing any parts.

When is the Code Detected?

U1255 is set when the control module does not receive a message that it was expecting from another control module, and does not know which control module did not send that message.

Need more information about the U1255 Chevrolet code?

Need more information on how to fix the U1255 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1255 Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 U1255 Chevrolet Code

1. What are the common symptoms of OBDII code U1255 in a Chevrolet?

The common symptoms of U1255 "Lost Communications with Multi-axis Acceleration Sensor Module" in a Chevrolet may include dashboard warning lights, loss of communication with the sensor module, and potentially erratic vehicle behavior.

2. What are some possible causes of OBDII code U1255 in a Chevrolet?

The causes of U1255 in a Chevrolet can range from a faulty multi-axis acceleration sensor module, wiring issues, loose connections, or a malfunction in the communication network within the vehicle.

3. How can I diagnose OBDII code U1255 in my Chevrolet?

Diagnosing U1255 typically involves using a diagnostic scanner to retrieve the trouble code, checking for any visible wiring issues or loose connections, and potentially testing the multi-axis acceleration sensor module for proper functionality.

4. Can I continue driving my Chevrolet with OBDII code U1255 present?

It is not recommended to drive a vehicle with an active U1255 code as it can affect the proper functioning of important safety systems. It is best to address the issue promptly to ensure safe operation of the vehicle.

5. How can I repair OBDII code U1255 in my Chevrolet?

Repairing U1255 may involve replacing the faulty multi-axis acceleration sensor module, repairing any damaged wiring or connections, and clearing the trouble code with a diagnostic scanner to reset the system.

6. Will resetting the trouble code fix OBDII code U1255 in my Chevrolet?

Resetting the trouble code may temporarily clear the warning lights, but if the underlying issue causing U1255 is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem.

7. Can a DIY enthusiast fix OBDII code U1255 in a Chevrolet?

While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing OBDII code U1255 may require specialized tools and expertise. It is recommended to seek professional help for proper diagnosis and repair.

8. How much does it cost to fix OBDII code U1255 in a Chevrolet?

The cost of fixing U1255 in a Chevrolet can vary depending on the root cause of the issue, labor rates, and the cost of any replacement parts needed. It is advisable to obtain quotes from automotive professionals for an accurate estimate.

9. Are there any recalls or technical service bulletins related to OBDII code U1255 in Chevrolet vehicles?

It is recommended to check with Chevrolet dealerships or online databases for any recalls or technical service bulletins related to U1255 in specific Chevrolet models. Manufacturers may provide assistance for known issues.

10. How can I prevent OBDII code U1255 from occurring in my Chevrolet?

To prevent U1255 from occurring, it is essential to perform regular vehicle maintenance, check for any signs of wiring or connection issues, and address any warning lights or unusual vehicle behavior promptly to avoid potential communication errors.

Discuss the causes and fixes for U1255 Chevrolet OBDII Code

Submit a New Comment