AutoCodes – Chevrolet – U1151 Chevrolet

U1151 Chevrolet Code - Lost Communications With Vehicle Communication Interface Module

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty Vehicle Communication Interface Module (VCIM), Vehicle Communication Interface Module harness is open or shorted, Vehicle Communication Interface 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: U1151 Chevrolet indicates Lost Communications With Vehicle Communication Interface Module.
Common causes: Common causes include Faulty Vehicle Communication Interface Module (VCIM), Vehicle Communication Interface Module harness is open or shorted, Vehicle Communication Interface 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 2,345

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 24, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1151 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 for the state of health monitoring/node alive messages. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. Once an identification number is learned by a module, it will monitor for that module node alive message. Each module on the class 2 serial data circuit is required to send a Node Alive message every 2 seconds. When no message is detected from a learned identification number for 5 seconds, a Diagnostic Trouble Code (DTC) U1151 is set.

OBDII Code U1151 Chevrolet - Lost Communications With Vehicle Communication Interface Module - AutoCodes.com — U1151 Chevrolet Code - Lost Communications With Vehicle Communication Interface Module

What does this mean?

What are the Possible Causes of the DTC U1151 Chevrolet?

Faulty Vehicle Communication Interface Module (VCIM)
Vehicle Communication Interface Module harness is open or shorted
Vehicle Communication Interface Module circuit poor electrical connection

How to Fix the DTC U1151 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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U1151 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.

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Need more information on how to fix the U1151 Chevrolet code? Get Access to Factory Service Manuals

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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 U1151 Chevrolet Code

1. What are the common symptoms of OBDII code U1151 in a Chevrolet indicating lost communications with the Vehicle Communication Interface Module (VCIM)?

- Common symptoms include loss of communication with the VCIM, malfunctioning infotainment system, and issues with other vehicle control modules.

2. What are the possible causes of OBDII code U1151 in a Chevrolet?

- The code U1151 can be triggered by a faulty VCIM, damaged wiring or connectors, software issues, or a problem with the vehicle's network communication system.

3. How can I diagnose the cause of OBDII code U1151 in my Chevrolet?

- To diagnose the issue, you may need to perform a thorough inspection of the VCIM, check the wiring and connectors for damage, and use a diagnostic scanner to analyze the communication between modules.

4. Can I still drive my Chevrolet with OBDII code U1151 present?

- It's generally safe to drive the vehicle with this code, but it's important to address the underlying issue promptly to prevent potential communication failures with other vehicle systems.

5. How can I repair OBDII code U1151 in my Chevrolet?

- Repair options may include replacing the VCIM, repairing damaged wiring or connectors, updating software, or reprogramming the vehicle's modules to restore proper communication.

6. Will disconnecting the battery reset OBDII code U1151 in my Chevrolet?

- Disconnecting the battery may temporarily clear the code, but it's recommended to diagnose the issue properly and address the root cause to prevent the code from reappearing.

7. Can a DIY enthusiast fix OBDII code U1151 in a Chevrolet?

- While some basic troubleshooting steps can be performed by DIY enthusiasts, diagnosing and repairing the underlying cause of the code may require advanced diagnostic tools and expertise.

8. How much does it cost to repair OBDII code U1151 in a Chevrolet?

- The cost of repairing this code can vary depending on the cause of the issue, parts needed, and labor costs. It's recommended to obtain quotes from reputable mechanics or dealerships.

9. Can OBDII code U1151 in a Chevrolet cause other problems if left unresolved?

- If left unresolved, code U1151 can lead to further communication issues between vehicle modules, potentially affecting the functionality of various vehicle systems.

10. Is OBDII code U1151 specific to Chevrolet vehicles, or can it occur in other makes and models?

- While U1151 is specific to Chevrolet vehicles, similar codes related to lost communication with vehicle modules can occur in other makes and models, each with its unique diagnostic and repair procedures.