AutoCodes – Pontiac – U2143 Pontiac

U2143 Pontiac 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 Pontiac 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 1,930

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

What does this mean?

What are the Possible Causes of the DTC U2143 Pontiac?

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 Pontiac?

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 Pontiac 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 Pontiac Code

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

- Common symptoms include the ABS warning light and traction control light illuminating on the dashboard, loss of power steering assistance, and potential issues with stability control systems.

2. What are the possible causes of OBDII code U2143 in a Pontiac?

- The code U2143 typically indicates a communication problem between the steering angle sensor and the vehicle's control module. This can be caused by wiring issues, a faulty sensor, or a problem with the control module itself.

3. How can I diagnose the root cause of OBDII code U2143 in my Pontiac?

- A thorough diagnostic process involving checking the wiring harness, connectors, sensor integrity, and control module functionality is necessary to pinpoint the exact cause of the communication failure.

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

- It is not recommended to drive the vehicle with the code U2143, as it can affect the proper functioning of critical safety systems like ABS and traction control. It is advisable to address the issue promptly.

5. What are some repair tips for fixing OBDII code U2143 in a Pontiac?

- Repair tips may include checking and repairing any damaged wiring, replacing the steering angle sensor if faulty, and reprogramming or replacing the control module if needed.

6. Is it possible to reset OBDII code U2143 in a Pontiac without addressing the underlying issue?

- While clearing the code may temporarily turn off the warning lights, the underlying communication problem between the steering angle sensor and the control module will persist unless properly diagnosed and repaired.

7. How much does it typically cost to repair OBDII code U2143 in a Pontiac?

- The cost of repair can vary depending on the specific cause of the communication failure. Costs may include labor charges for diagnostics and repairs, as well as the price of any replacement parts needed.

8. Are there any recalls or technical service bulletins related to OBDII code U2143 in Pontiac vehicles?

- It is advisable to check with Pontiac or a certified dealership for any recalls or technical service bulletins related to OBDII code U2143, as manufacturers sometimes provide assistance for known issues.

9. Can a DIY enthusiast with basic automotive knowledge fix OBDII code U2143 in a Pontiac?

- While some aspects of diagnosing and repairing the code may be within reach of a DIY enthusiast, dealing with complex electrical systems and sensors may require specialized tools and expertise, so professional help is recommended.

10. How long does it typically take to repair OBDII code U2143 in a Pontiac?

- The repair time can vary based on the exact cause of the communication failure and the availability of parts. In some cases, a repair can be completed in a few hours, while more complex issues may require additional time for diagnosis and repair.