AutoCodes – Buick – U2122 Buick

U2122 Buick 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 Buick 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 447

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

What does this mean?

What are the Possible Causes of the DTC U2122 Buick?

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

How to Fix the DTC U2122 Buick?

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 Buick 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 Buick code?

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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 U2122 Buick Code

1. What are common symptoms of OBDII code U2122 in a Buick related to lost communication with the radio unit?

- Common symptoms include the radio not working, display screen issues, and related features malfunctioning.

2. What are the possible causes of OBDII code U2122 in a Buick indicating lost communication with the radio unit?

- Possible causes include a faulty radio unit, damaged wiring or connectors, software glitches, or a communication network issue.

3. How can I diagnose the OBDII code U2122 in a Buick for lost communication with the radio unit?

- Diagnosis involves checking the radio unit for power and ground, inspecting wiring and connectors for damage, and using a scan tool to assess communication on the network.

4. Can I still drive my Buick with OBDII code U2122 related to the radio unit communication issue?

- Driving with this code may be possible, but it's recommended to address the issue promptly to prevent potential electrical system problems.

5. What repair tips can help resolve OBDII code U2122 in a Buick for lost communication with the radio unit?

- Repair tips include checking and repairing wiring connections, resetting the radio unit, updating software if applicable, or replacing the radio unit if necessary.

6. Is it safe to attempt DIY repairs for OBDII code U2122 in a Buick caused by lost communication with the radio unit?

- DIY repairs like checking connections and fuses can be safe, but more complex tasks involving software updates or component replacement may require professional assistance.

7. Will resetting the OBDII code U2122 in a Buick reset the lost communication with the radio unit issue?

- Resetting the code may temporarily clear it, but the underlying communication problem with the radio unit will likely persist until addressed.

8. How much does it typically cost to repair OBDII code U2122 in a Buick related to lost communication with the radio unit?

- Repair costs can vary depending on the specific issue, but expenses may include diagnostic fees, parts replacement, and labor, potentially ranging from $100 to $500 or more.

9. Are there any common recalls or technical service bulletins related to OBDII code U2122 in Buick vehicles with radio communication problems?

- It's advisable to check with Buick dealerships or online resources for any relevant recalls or bulletins addressing communication issues with the radio unit.

10. Can OBDII code U2122 in a Buick lead to other electrical problems in the vehicle?

- Yes, unresolved communication issues with the radio unit can potentially affect other systems on the vehicle's communication network, leading to additional electrical problems if left unaddressed.