AutoCodes – Chevrolet – U2143 Chevrolet

U2143 Chevrolet Code - Lost Communications With Steering Angle Sensor

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Steering Angle Sensor (SAS), Steering Angle Sensor harness is open or shorted, Steering Angle Sensor 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: U2143 Chevrolet indicates Lost Communications With Steering Angle Sensor.
Common causes: Common causes include Faulty Steering Angle Sensor (SAS), Steering Angle Sensor harness is open or shorted, Steering Angle Sensor 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 5,294

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 U2143 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 U2143 Chevrolet - Lost Communications With Steering Angle Sensor - AutoCodes.com — U2143 Chevrolet Code - Lost Communications With Steering Angle Sensor

What does this mean?

What are the Possible Causes of the DTC U2143 Chevrolet?

Faulty Steering Angle Sensor (SAS)
Steering Angle Sensor harness is open or shorted
Steering Angle Sensor circuit poor electrical connection

How to Fix the DTC U2143 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 U2143 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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Need more information on how to fix the U2143 Chevrolet code? Get Access to Factory Service Manuals

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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 U2143 Chevrolet Code

1. What are common symptoms of the OBDII code U2143 in a Chevrolet related to lost communications with the steering angle sensor?

- Common symptoms include issues with the electronic stability control system, traction control system malfunctions, and the illumination of the ABS warning light on the dashboard.

2. What are some possible causes of the U2143 code in a Chevrolet indicating lost communications with the steering angle sensor?

- Potential causes may include a faulty steering angle sensor, damaged wiring or connectors in the steering angle sensor circuit, or issues with the electronic control module.

3. How can I diagnose the U2143 code in my Chevrolet related to lost communications with the steering angle sensor?

- Diagnosing this code typically involves using a diagnostic scanner to retrieve the trouble codes, checking the wiring and connectors for any damage, and testing the steering angle sensor for proper functionality.

4. Can I continue driving my Chevrolet with the U2143 code present?

- It is not recommended to drive the vehicle with the U2143 code as it may affect the proper functioning of important safety systems like ABS and stability control.

5. How can I repair the U2143 code in my Chevrolet due to lost communications with the steering angle sensor?

- Repairing this code often involves addressing the root cause, such as replacing a faulty steering angle sensor, repairing damaged wiring, or reprogramming the electronic control module.

6. Are there any DIY tips for troubleshooting the U2143 code in a Chevrolet?

- While basic checks like inspecting wiring connections can be done by DIY enthusiasts, diagnosing and repairing the U2143 code may require professional tools and expertise.

7. How much does it typically cost to repair the U2143 code in a Chevrolet at a dealership or repair shop?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve diagnostic fees, parts replacement costs, and labor charges, which can range from a few hundred to a thousand dollars.

8. Can a U2143 code be a recurring issue in a Chevrolet even after it has been repaired?

- If the root cause of the U2143 code is not properly addressed during the repair, it may recur. Ensuring a thorough diagnosis and repair can help prevent the issue from coming back.

9. Is it necessary to reset the trouble codes after repairing the U2143 code in a Chevrolet?

- Yes, it is important to clear the trouble codes after repairing the U2143 code to reset the system and ensure that the issue has been properly resolved.

10. How can regular maintenance help prevent the occurrence of the U2143 code in a Chevrolet related to the steering angle sensor?

- Regular maintenance, including checking the steering system components, inspecting wiring for damage, and keeping the electronic control module updated, can help prevent issues like the U2143 code from occurring.