AutoCodes – Chevrolet – U1255 Chevrolet

U1255 Chevrolet Code - Lost Communications

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Loose control module connectors, Faulty control module, Control modules poor lectrical 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
U1255 Chevrolet indicates Lost Communications.
Common causes
Common causes include Loose control module connectors, Faulty control module, Control modules poor lectrical 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 26,853
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 05, 2020
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Code U1255 Chevrolet Description

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message. These node alive messages are used for State of Health monitoring. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. When a module does not associate an identification number with at least one critical parameter within 5 seconds of beginning serial data communication, DTC U1000 or U1255 is set. When more than one critical parameter does not have an identification number associated with it, the DTC will only be reported once. The following modules communicate on the class 2 serial data circuit:
- Audio amplifier
- Cellular telephone module w/UV8
- Dash integration module (DIM)
- Digital radio receiver
- Driver door module (DDM)
- Driver door switch assembly (DDSA)
- Electronic brake control module (EBCM)
- Electronic suspension control module (ESC)
- Front passenger door module (FPDM)
- Inflatable restraint sensing and diagnostic module (SDM)
OBDII Code U1255 Chevrolet - Lost Communications - AutoCodes.com
U1255 Chevrolet Code - Lost Communications

What are the Possible Causes of the DTC U1255 Chevrolet?

  • Loose control module connectors
  • Faulty control module
  • Control modules poor lectrical connection
  • Control Modules harness open or shorted

How to Fix the DTC U1255 Chevrolet?

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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U1255 Chevrolet 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.

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

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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

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