AutoCodes – Pontiac – U1151 Pontiac

U1151 Pontiac 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 Pontiac 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 583

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

What does this mean?

What are the Possible Causes of the DTC U1151 Pontiac?

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 Pontiac?

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 Pontiac 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 U1151 Pontiac Code

1. What are the common symptoms of OBDII code U1151 in a Pontiac?

- Common symptoms include issues with the vehicle's communication systems, such as loss of connection with various modules and control units, malfunctioning of electronic components, and warning lights on the dashboard.

2. What could cause the U1151 code in a Pontiac?

- The U1151 code is typically triggered by a communication breakdown between the vehicle communication interface module and other modules or devices in the car. This can be due to wiring issues, a faulty communication module, or software glitches.

3. How can I diagnose the U1151 code in my Pontiac?

- Diagnosing the U1151 code usually involves using an OBDII scanner to retrieve the specific error code, checking the wiring and connections related to the vehicle communication interface module, and performing a thorough inspection of the communication module itself.

4. Can I still drive my Pontiac with the U1151 code present?

- It is not recommended to drive the vehicle with the U1151 code active, as it can lead to further communication issues and potential safety hazards. It is best to address the problem promptly to avoid any complications.

5. How can I repair the U1151 code in my Pontiac?

- Repairing the U1151 code may involve fixing any wiring issues, replacing the faulty communication module, updating software if needed, and resetting the error code using an OBDII scanner. It is advisable to consult a professional mechanic for accurate diagnosis and repair.

6. Is the U1151 code specific to Pontiac vehicles only?

- The U1151 code is a generic communication error code that can be found in various vehicle makes and models, not limited to Pontiac. The underlying causes and repair procedures may vary depending on the specific vehicle.

7. How much does it typically cost to repair the U1151 code in a Pontiac?

- The cost of repairing the U1151 code in a Pontiac can vary depending on the extent of the issue, the parts needed for repair, and labor costs. It is recommended to obtain quotes from different auto repair shops for an accurate estimate.

8. Can a DIY enthusiast fix the U1151 code in a Pontiac?

- While some DIY enthusiasts may have the skills to diagnose and repair the U1151 code, it is generally recommended to seek professional help for complex electrical and communication system issues to ensure the problem is addressed correctly.

9. Will disconnecting the battery reset the U1151 code in a Pontiac?

- Disconnecting the battery may reset the error codes temporarily, but it is not a guaranteed fix for the U1151 code. The underlying issue causing the communication problem needs to be diagnosed and repaired to fully resolve the problem.

10. How can I prevent the U1151 code from recurring in my Pontiac?

- To prevent the U1151 code from recurring, it is essential to maintain the vehicle's communication systems regularly, address any wiring issues promptly, and follow recommended maintenance schedules to avoid potential communication module failures.