AutoCodes – Buick – U2111 Buick

U2111 Buick Code - Lost Communication With Steering Control System

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Steering Control System Module, Steering Control System Module harness is open or shorted, Steering Control System 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: U2111 Buick indicates Lost Communication With Steering Control System.
Common causes: Common causes include Faulty Steering Control System Module, Steering Control System Module harness is open or shorted, Steering Control System 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 U2111 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 U2111 Buick - Lost Communication With Steering Control System - AutoCodes.com — U2111 Buick Code - Lost Communication With Steering Control System

What does this mean?

What are the Possible Causes of the DTC U2111 Buick?

Faulty Steering Control System Module
Steering Control System Module harness is open or shorted
Steering Control System Module circuit poor electrical connection

How to Fix the DTC U2111 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 U2111 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 U2111 Buick Code

1. What does the OBDII code U2111 mean on a Buick?

U2111 indicates a loss of communication with the Steering Control System, which means the vehicle's modules are unable to communicate properly with the steering system.

2. What are the common symptoms of the U2111 code in a Buick?

Symptoms may include a malfunctioning power steering system, warning lights on the dashboard (such as the steering or stability control light), and impaired steering responsiveness.

3. What causes the U2111 code to appear in a Buick?

Common causes include a faulty Steering Control Module (SCM), damaged wiring or connectors, a weak battery, or communication issues within the vehicle's CAN (Controller Area Network) bus system.

4. Can the U2111 code affect driving safety?

Yes, this code can impact steering performance, which may lead to difficulty controlling the vehicle and pose a safety risk.

5. How can I diagnose the U2111 code on my Buick?

Use an OBDII scanner to confirm the code, inspect the wiring and connectors for the Steering Control Module, and check the battery voltage and CAN bus communication lines.

6. How do I fix the U2111 code on a Buick?

Repairs may include replacing or repairing damaged wiring, cleaning or reconnecting loose connectors, updating the Steering Control Module software, or replacing the module if necessary.

7. Can a low or weak battery trigger the U2111 code?

Yes, a weak or failing battery can cause communication issues within the vehicle's modules and trigger the U2111 code.

8. Is it safe to drive with the U2111 code active?

It is not recommended to drive with this code active, as it can affect the power steering system and compromise vehicle handling.

9. Does resetting the code fix the U2111 issue?

Resetting the code without addressing the root cause may temporarily clear it, but the issue will likely return until proper repairs are made.

10. Should I take my Buick to a mechanic for the U2111 code?

If youâ€™re unable to identify and resolve the issue yourself, it is best to take the vehicle to a qualified mechanic for further diagnosis and repair.