AutoCodes – GMC – U2143 GMC

U2143 GMC 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 GMC 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 889

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

What does this mean?

What are the Possible Causes of the DTC U2143 GMC?

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 GMC?

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 GMC 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 U2143 GMC Code

1. What are the common symptoms of OBDII code U2143 GMC (Lost Communications With Steering Angle Sensor)?

- Common symptoms include the ABS warning light or traction control light illuminating on the dashboard, erratic steering behavior, and potential loss of stability control features.

2. What are some possible causes of OBDII code U2143 GMC?

- Possible causes include a faulty steering angle sensor, damaged wiring or connectors in the steering angle sensor circuit, a malfunctioning ABS module, or a software issue in the vehicle's control module.

3. How can I diagnose the issue related to OBDII code U2143 GMC?

- Diagnosis typically involves scanning the vehicle with an OBDII scanner to retrieve the specific code, inspecting the steering angle sensor and related wiring for damage, and testing the communication between the sensor and the control modules using a diagnostic tool.

4. Can I continue driving my vehicle with OBDII code U2143 GMC present?

- It is not recommended to drive the vehicle with this code present, as it can affect the proper functioning of the stability control system and potentially compromise safety on the road.

5. How can I repair OBDII code U2143 GMC?

- Repair options may include replacing the faulty steering angle sensor, repairing damaged wiring or connectors, reprogramming the control modules, or addressing any underlying issues identified during diagnosis.

6. Is it safe to reset the code and clear the error without addressing the underlying issue?

- Clearing the code without addressing the underlying issue may temporarily turn off the warning lights, but the problem will likely reoccur, and the safety systems affected by the code will remain compromised.

7. Can a DIY enthusiast fix OBDII code U2143 GMC at home?

- While some basic checks like inspecting wiring connections can be done at home, diagnosing and repairing the root cause of the code may require specialized tools and expertise, so it's advisable to consult a professional mechanic.

8. How much does it cost to repair OBDII code U2143 GMC at a dealership or repair shop?

- The cost of repair can vary depending on the specific cause of the code and the labor rates of the dealership or repair shop, but it's recommended to obtain a detailed estimate before proceeding with the repairs.

9. Are there any recalls or technical service bulletins related to OBDII code U2143 GMC?

- It's advisable to check with the vehicle manufacturer or authorized service centers for any recalls or technical service bulletins related to this specific OBDII code, as there may be relevant information or remedies available.

10. How can I prevent OBDII code U2143 GMC from occurring in the future?

- Regular maintenance, including checking and cleaning sensor connections, inspecting wiring for damage, and addressing any warning lights promptly, can help prevent issues leading to the U2143 code.