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U2143 Cadillac 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 Cadillac 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 842

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

What does this mean?

What are the Possible Causes of the DTC U2143 Cadillac?

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 Cadillac?

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 Cadillac 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 Cadillac Code

1. What are common symptoms of the U2143 Cadillac OBDII code?

- Common symptoms include an illuminated check engine light, loss of power steering assistance, and potential issues with stability control systems.

2. What does the U2143 code indicate in a Cadillac vehicle?

- The U2143 code indicates that there is a communication problem between the vehicle's control modules and the steering angle sensor.

3. What are possible causes of the U2143 code in a Cadillac?

- Possible causes include faulty wiring or connections, a malfunctioning steering angle sensor, issues with the CAN bus communication system, or a defective control module.

4. How can I diagnose the U2143 code in my Cadillac?

- Diagnosing the U2143 code typically involves checking the wiring and connections related to the steering angle sensor, inspecting the sensor itself for proper functioning, and using a diagnostic scanner to read the code and identify the specific issue.

5. Can I drive my Cadillac with the U2143 code?

- It is not recommended to drive your Cadillac with the U2143 code present, as it can affect the proper operation of critical safety systems like power steering and stability control.

6. How can I repair the U2143 code in my Cadillac?

- Repairing the U2143 code may involve fixing any wiring issues, replacing the steering angle sensor if necessary, addressing problems with the control modules or CAN bus system, and clearing the code with a diagnostic scanner.

7. Is it safe to continue driving if the power steering assistance is lost due to the U2143 code?

- It is not safe to drive without power steering assistance, as it can make steering difficult and compromise vehicle control. It is recommended to address the issue promptly.

8. How much does it cost to repair the U2143 code in a Cadillac?

- The cost of repairing the U2143 code can vary depending on the specific cause of the issue, but it may involve expenses for parts replacement, labor costs, and diagnostic services.

9. Can the U2143 code be intermittent in a Cadillac?

- Yes, the U2143 code can be intermittent, meaning that the communication problem between the modules and the steering angle sensor may come and go. It is important to address the underlying issue to prevent further problems.

10. Is it necessary to reset the steering angle sensor after repairing the U2143 code?

- Yes, it is recommended to reset the steering angle sensor after repairing the U2143 code to ensure proper calibration and functionality of the system.