AutoCodes – Buick – U2112 Buick

U2112 Buick Code - Lost Communication With Electronic Suspension Control Module

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Electronic Suspension Control (ESC) Module, Electronic Suspension Control Module harness is open or shorted, Electronic Suspension Control 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: U2112 Buick indicates Lost Communication With Electronic Suspension Control Module.
Common causes: Common causes include Faulty Electronic Suspension Control (ESC) Module, Electronic Suspension Control Module harness is open or shorted, Electronic Suspension Control 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 512

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 U2112 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 U2112 Buick - Lost Communication With Electronic Suspension Control Module - AutoCodes.com — U2112 Buick Code - Lost Communication With Electronic Suspension Control Module

What does this mean?

What are the Possible Causes of the DTC U2112 Buick?

Faulty Electronic Suspension Control (ESC) Module
Electronic Suspension Control Module harness is open or shorted
Electronic Suspension Control Module circuit poor electrical connection

How to Fix the DTC U2112 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 U2112 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.

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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 U2112 Buick Code

1. What does the OBDII code U2112 mean for a Buick?

U2112 indicates a loss of communication between the vehicle's main control modules and the Electronic Suspension Control (ESC) module.

2. What are the common symptoms of the U2112 code in a Buick?

Common symptoms include a suspension warning light on the dashboard, changes in ride quality, and possible failure of the adaptive suspension system.

3. What causes the U2112 code to appear in a Buick?

The code can be caused by wiring issues, a faulty ESC module, a bad connection at the module, or a failure in the CAN (Controller Area Network) communication system.

4. Can I drive my Buick with the U2112 code active?

While the vehicle may still be drivable, the suspension system may not function properly, leading to reduced ride comfort and handling performance.

5. How is the U2112 code diagnosed in a Buick?

A technician will use a scan tool to check for communication errors, inspect the wiring and connectors for damage, and test the ESC module for functionality.

6. Can a blown fuse trigger the U2112 code on a Buick?

Yes, a blown fuse related to the ESC module or CAN network could interrupt communication and trigger the code.

7. How do I fix the U2112 code on my Buick?

Repairs may include fixing damaged wiring, cleaning or reconnecting loose connectors, replacing the ESC module, or addressing CAN network issues.

8. Is the U2112 code a common issue in Buicks with adaptive suspension?

Itâ€™s not extremely common, but it can occur in Buicks equipped with electronic suspension systems, especially as components age or if there are electrical problems.

9. How much does it cost to repair the U2112 code on a Buick?

The cost varies depending on the issue, ranging from $100 for minor wiring repairs to $1,000 or more if the ESC module needs replacement.

10. Can a software update resolve the U2112 code in a Buick?

In some cases, reprogramming or updating the vehicleâ€™s control modules can resolve communication errors like U2112. A dealership or qualified technician can determine if this is needed.