AutoCodes – Chevrolet – U2122 Chevrolet

U2122 Chevrolet Code - Lost Communication With Radio Unit

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Radio Unit, Radio Unit harness is open or shorted, Radio 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: U2122 Chevrolet indicates Lost Communication With Radio Unit.
Common causes: Common causes include Faulty Radio Unit, Radio Unit harness is open or shorted, Radio 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 2,794

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 U2122 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 U2122 Chevrolet - Lost Communication With Radio Unit - AutoCodes.com — U2122 Chevrolet Code - Lost Communication With Radio Unit

What does this mean?

What are the Possible Causes of the DTC U2122 Chevrolet?

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

How to Fix the DTC U2122 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 U2122 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.

Need more information about the U2122 Chevrolet code?

Need more information on how to fix the U2122 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U2122 Chevrolet 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 U2122 Chevrolet Code

1. What are some common symptoms of the OBDII code U2122 in a Chevrolet indicating a lost communication with the radio unit?

- Common symptoms include the radio display not functioning, no sound coming from the speakers, and loss of control over radio functions.

2. What are the possible causes of the U2122 code in a Chevrolet related to lost communication with the radio unit?

- The code can be triggered by issues such as a faulty radio unit, damaged wiring or connectors, a blown fuse, or a communication network error.

3. How can I diagnose the U2122 code in my Chevrolet to determine the exact cause of the lost communication with the radio unit?

- It is recommended to start by checking the radio fuse, inspecting the wiring and connectors for any damage, and using a diagnostic scanner to identify which specific component is causing the communication issue.

4. Is it safe to continue driving my Chevrolet with the U2122 code indicating a lost communication with the radio unit?

- While the code itself does not pose a direct safety risk, it is advisable to address the underlying communication issue to prevent potential complications with other vehicle systems.

5. Can I reset the U2122 code in my Chevrolet to see if the communication with the radio unit is restored?

- You can attempt to clear the code using an OBDII scanner, but it is important to address the root cause of the communication problem to prevent the code from reappearing.

6. Are there any DIY repair tips for fixing the U2122 code indicating lost communication with the radio unit in a Chevrolet?

- DIY enthusiasts can start by checking and replacing the radio fuse, inspecting the wiring for damage, and ensuring all connectors are securely attached to troubleshoot common issues.

7. If I cannot resolve the U2122 code issue on my own, should I seek professional help for repairing the lost communication with the radio unit in my Chevrolet?

- If basic troubleshooting steps do not resolve the problem, it is recommended to consult a qualified mechanic or dealership to diagnose and repair the communication issue effectively.

8. Will fixing the U2122 code related to lost communication with the radio unit affect the performance or functionality of other vehicle systems in my Chevrolet?

- Resolving the communication issue with the radio unit should not impact the performance of other vehicle systems, but it will ensure proper functionality of the radio and related features.

9. Is the U2122 OBDII code specific to Chevrolet vehicles, or can it occur in other car makes and models?

- While the U2122 code is commonly associated with Chevrolet vehicles, similar communication issues with radio units can occur in other car makes and models, triggering comparable diagnostic codes.

10. Can weather conditions or external factors trigger the U2122 code indicating lost communication with the radio unit in a Chevrolet?

- Extreme weather conditions, water damage, or electrical interference can potentially disrupt communication with the radio unit, leading to the U2122 diagnostic trouble code.