AutoCodes – Generic – U2179

U2179 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 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 807

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

What does this mean?

What are the Possible Causes of the DTC U2179?

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

How to Fix the DTC U2179?

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 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 U2179 code?

Need more information on how to fix the U2179 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2179 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U2179 Buick — Lost Communication With Television Module
U2179 Cadillac — Lost Communication With Television Module
U2179 Chevrolet — Lost Communication With Television Module
U2179 GMC — Lost Communication With Television Module

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 Code

1. What are common symptoms of OBDII code U2179, Lost Communication With Television Module?

The common symptoms include loss of functionality of the television module, no display on the screen, and potential issues with other vehicle electronics.

2. What are possible causes of OBDII code U2179?

Possible causes include a faulty television module, damaged wiring or connectors, a software glitch, or a communication network issue within the vehicle.

3. How can I diagnose the root cause of OBDII code U2179?

Diagnosing the code requires using a professional OBDII scanner to retrieve the specific error codes, checking the wiring and connectors for damage, and performing a network communication test.

4. Can I still drive my vehicle with OBDII code U2179 present?

It is not recommended to drive the vehicle with this code present, as it may affect other systems and potentially lead to further issues. It's best to address the problem promptly.

5. How can I repair OBDII code U2179, Lost Communication With Television Module?

Repair options include replacing the faulty television module, repairing damaged wiring or connectors, updating software if applicable, and ensuring proper communication network functionality.

6. Are there any DIY tips for fixing OBDII code U2179?

DIY tips include checking and securing wiring connections, ensuring all fuses related to the television module are intact, and performing a basic reset by disconnecting the vehicle's battery.

7. Is it necessary to visit a mechanic for OBDII code U2179 repair?

While some basic checks and repairs can be done DIY, it is recommended to visit a mechanic or dealership for a thorough diagnosis and repair to ensure the issue is properly resolved.

8. Can OBDII code U2179 cause other problems in the vehicle?

Yes, unresolved communication issues like U2179 can potentially lead to malfunctions in other vehicle systems that rely on data from the television module or the vehicle's communication network.

9. How long does it typically take to repair OBDII code U2179?

The repair time can vary depending on the exact cause of the issue. Simple fixes like reconnecting a loose wire may take a short time, while more complex issues like replacing a module could take several hours.

10. What should I do if the OBDII code U2179 keeps recurring after repair?

If the code keeps coming back after repair, it may indicate an underlying issue that was not fully addressed. In such cases, a more in-depth diagnosis by a professional may be necessary to identify and resolve the problem.