AutoCodes – GMC – U1167 GMC

U1167 GMC Code - Lost Communications With Rear Seat Audio Controller

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty Rear Seat Audio Controller (RSA), Rear Seat Audio Controller harness is open or shorted, Rear Seat Audio Controller 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: U1167 GMC indicates Lost Communications With Rear Seat Audio Controller.
Common causes: Common causes include Faulty Rear Seat Audio Controller (RSA), Rear Seat Audio Controller harness is open or shorted, Rear Seat Audio Controller 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 858

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U1167 GMC 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) U1167 is set.

OBDII Code U1167 GMC - Lost Communications With Rear Seat Audio Controller - AutoCodes.com — U1167 GMC Code - Lost Communications With Rear Seat Audio Controller

What does this mean?

What are the Possible Causes of the DTC U1167 GMC?

Faulty Rear Seat Audio Controller (RSA)
Rear Seat Audio Controller harness is open or shorted
Rear Seat Audio Controller circuit poor electrical connection

How to Fix the DTC U1167 GMC?

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 U1167 GMC 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 U1167 GMC code?

Need more information on how to fix the U1167 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1167 GMC 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 U1167 GMC Code

1. What are the common symptoms of OBDII code U1167 GMC (Lost Communications With Rear Seat Audio Controller)?

- Common symptoms include loss of audio output from the rear seat entertainment system, malfunctioning volume controls, and issues with audio source selection.

2. What are the possible causes of OBDII code U1167 GMC?

- Possible causes may include a faulty rear seat audio controller, damaged wiring or connectors between the controller and the main system, or a communication error within the vehicle's network.

3. How can I diagnose the issue related to code U1167 GMC?

- Diagnose the problem by checking the wiring and connectors for any visible damage, testing the rear seat audio controller for functionality, and using a diagnostic scanner to analyze communication signals within the system.

4. Can a loose connection trigger code U1167 GMC?

- Yes, a loose or poor connection between the rear seat audio controller and the main system can lead to code U1167 GMC triggering due to communication disruptions.

5. Is it possible to reset code U1167 GMC without repairing the issue?

- It is possible to clear the code temporarily by using a diagnostic scanner to reset the system. However, the code is likely to reappear if the underlying issue with the communication remains unresolved.

6. Are there any DIY repair tips for addressing code U1167 GMC?

- DIY repair tips may include checking and securing all connections, inspecting for visible wiring damage, and ensuring proper power supply to the rear seat audio controller.

7. Can code U1167 GMC be a serious issue that affects vehicle performance?

- While code U1167 GMC typically relates to a communication problem with the rear seat audio system, ignoring the issue could potentially lead to other electrical malfunctions within the vehicle's network over time.

8. How much does it cost to repair OBDII code U1167 GMC at a professional auto repair shop?

- The cost of repairing code U1167 GMC can vary depending on the extent of the issue, but it may involve diagnostic fees, labor costs, and parts replacement, potentially ranging from $100 to $300 or more.

9. Is it safe to continue driving with OBDII code U1167 GMC present?

- It is generally safe to drive with code U1167 GMC present, as it primarily affects the rear seat audio system. However, it is recommended to address the issue promptly to prevent any potential electrical problems down the line.

10. How long does it typically take to repair code U1167 GMC?

- The repair time for code U1167 GMC can vary based on the specific cause of the issue. Simple fixes like reconnecting loose wires may take a short time, while more complex problems could require several hours or even a full day at the repair shop.