AutoCodes – Chevrolet – U2125 Chevrolet

U2125 Chevrolet Code - Lost Communication With Telematic Unit

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Telematic Unit, Telematic Unit harness is open or shorted, Telematic Unit 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: U2125 Chevrolet indicates Lost Communication With Telematic Unit.
Common causes: Common causes include Faulty Telematic Unit, Telematic Unit harness is open or shorted, Telematic Unit 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 1,324

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 U2125 Chevrolet 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 U2125 Chevrolet - Lost Communication With Telematic Unit - AutoCodes.com — U2125 Chevrolet Code - Lost Communication With Telematic Unit

What does this mean?

What are the Possible Causes of the DTC U2125 Chevrolet?

Faulty Telematic Unit
Telematic Unit harness is open or shorted
Telematic Unit circuit poor electrical connection

How to Fix the DTC U2125 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 U2125 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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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 U2125 Chevrolet Code

1. What are the common symptoms of OBDII code U2125 (Lost Communication With Telematic Unit) in a Chevrolet vehicle?

- Common symptoms include loss of communication with the telematics system, malfunction indicator light (MIL) illumination, and potential issues with vehicle tracking or remote services.

2. What are the possible causes of the U2125 trouble code in a Chevrolet vehicle?

- The code U2125 can be triggered by issues such as a faulty telematic unit, wiring or connection problems, software glitches, or electronic control module (ECM) issues.

3. How can I diagnose the U2125 trouble code in my Chevrolet for a Lost Communication With Telematic Unit error?

- Diagnosing U2125 involves using a professional OBDII scanner to read the code, checking for other related codes, inspecting the telematic unit connections, and performing a system reset if necessary.

4. Can a DIY enthusiast repair the U2125 OBDII code related to Lost Communication With Telematic Unit in a Chevrolet?

- While some basic troubleshooting like checking connections can be done by a DIYer, resolving deeper issues with the telematic unit or ECM may require professional diagnostic equipment and expertise.

5. Are there any temporary fixes or workarounds for the U2125 code in a Chevrolet until it can be properly repaired?

- In some cases, resetting the system by disconnecting the battery for a few minutes may temporarily clear the code, but it is recommended to address the underlying issue promptly.

6. Is it safe to continue driving a Chevrolet with the U2125 code indicating Lost Communication With Telematic Unit?

- It is generally safe to drive the vehicle with this code, but it is important to address the issue promptly to ensure proper functioning of the telematics system and related services.

7. Will clearing the U2125 trouble code in a Chevrolet reset the telematic unit to normal functioning?

- Clearing the code may temporarily reset the system, but if the underlying issue causing the code is not resolved, the problem is likely to reoccur.

8. How much can I expect to pay for repairing the U2125 code related to Lost Communication With Telematic Unit in a Chevrolet?

- The cost of repairing U2125 can vary depending on the exact cause of the issue, but it may involve fees for diagnostic services, parts replacement, and labor, potentially ranging from a few hundred to over a thousand dollars.

9. Can extreme weather conditions or environmental factors trigger the U2125 trouble code in a Chevrolet?

- While extreme weather conditions may not directly cause the U2125 code, they can potentially exacerbate existing electrical or connection issues leading to communication problems with the telematic unit.

10. How long does it typically take to repair the U2125 code related to Lost Communication With Telematic Unit in a Chevrolet?

- The repair time for U2125 can vary based on the complexity of the issue. Simple fixes like reconnecting loose wires may take less than an hour, while more involved repairs could require several hours or even days to diagnose and resolve.