AutoCodes – GMC – U2179 GMC

U2179 GMC Code - Lost Communication With Television Module

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Television Module, Television Module harness is open or shorted, Television 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: U2179 GMC indicates Lost Communication With Television Module.
Common causes: Common causes include Faulty Television Module, Television Module harness is open or shorted, Television 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 508

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 Jun 16, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U2179 GMC Description

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device. A loss of serial data communications Diagnostic Trouble Code (DTC) does not represent a failure of the devices that contain the stored code. The DTC will set when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U2179 GMC - Lost Communication With Television Module - AutoCodes.com — U2179 GMC Code - Lost Communication With Television Module

What does this mean?

What are the Possible Causes of the DTC U2179 GMC?

Faulty Television Module
Television Module harness is open or shorted
Television Module circuit poor electrical connection

How to Fix the DTC U2179 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 U2179 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.

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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 U2179 GMC Code

1. What are the common symptoms of OBDII code U2179 GMC (Lost Communication With Television Module)?

- Common symptoms include the malfunction indicator light (MIL) illuminating on the dashboard, loss of communication with the television module, and potential issues with the vehicle's entertainment system.

2. What are the possible causes of the U2179 GMC trouble code?

- Possible causes of this code include a faulty television module, damaged wiring or connectors related to the television module, software issues, or a communication network problem within the vehicle.

3. How can I diagnose the U2179 GMC trouble code?

- Diagnosing this code typically involves using a professional OBDII scanner to retrieve the specific fault codes, checking the wiring and connectors related to the television module, and performing network communication tests to identify the root cause.

4. What are some repair tips for addressing the U2179 GMC code?

- Repair tips may include inspecting and repairing any damaged wiring or connectors, replacing the faulty television module if necessary, updating software as recommended by the manufacturer, and ensuring proper network communication within the vehicle.

5. Can I drive my vehicle with the U2179 GMC trouble code?

- It is generally not recommended to drive the vehicle with unresolved communication issues, as it may affect the functionality of the entertainment system and potentially lead to other electrical problems. It is advisable to address the code promptly.

6. How much does it typically cost to repair the U2179 GMC trouble code?

- The cost of repairing this code can vary depending on the specific cause of the issue, the labor rates of the repair shop, and the cost of any replacement parts needed. It is advisable to obtain a diagnosis and repair estimate from a qualified mechanic.

7. Is the U2179 GMC trouble code a common issue in GMC vehicles?

- While this code may not be as common as some other OBDII codes, issues related to lost communication with modules can occur in various vehicle makes and models, including GMC vehicles equipped with the affected television module.

8. Are there any preventive measures to avoid the U2179 GMC trouble code?

- Regularly maintaining and inspecting the vehicle's electrical system, including the entertainment system components, can help prevent communication issues that may trigger the U2179 trouble code. Following the manufacturer's recommended maintenance schedule is also key.

9. Can I reset the U2179 GMC trouble code on my own?

- While you can clear the trouble code with an OBDII scanner, it is essential to diagnose and address the underlying issue causing the code to prevent it from reoccurring. If the root cause is not resolved, the code is likely to return.

10. How long does it take to repair the U2179 GMC trouble code?

- The repair time for this code can vary depending on the complexity of the issue, the availability of parts, and the expertise of the technician. Simple fixes like reconnecting a loose wire may take less time, while more involved repairs could require additional diagnostic steps and labor.