AutoCodes – Buick – P143A Buick

P143A Buick Code - Reductant Control System Diagnostic Signal Message Counter Incorrect

Quick Answer

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Common causes include Faulty Reductant Control System. 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: P143A Buick indicates Reductant Control System Diagnostic Signal Message Counter Incorrect.
Common causes: Common causes include Faulty Reductant Control System.
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 344

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 Sep 28, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P143A Buick Description

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Operating information and commands are exchanged among the control modules. Each module on the serial data circuit maintains a transmit error counter and a receive error counter. The counter values increase with detected errors and decrease with error-free messages. The Diagnostic Trouble Code (DTC) will be set when the Reductant Control System Diagnostic Signal Message Counter is Incorrect.

OBDII Code P143A Buick - Reductant Control System Diagnostic Signal Message Counter Incorrect - AutoCodes.com — P143A Buick Code - Reductant Control System Diagnostic Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P143A Buick?

Faulty Reductant Control System

How to Fix the DTC P143A 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 P143A 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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Need Help with the Code?

Get the P143A Buick code diagnosed by a professional: Find a repair shop in your area

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 P143A Buick Code

1. What are the common symptoms of OBDII code P143A in a Buick related to the Reductant Control System Diagnostic Signal Message Counter Incorrect?

- Common symptoms may include the Check Engine Light illuminating on the dashboard and possible reduced engine performance.

2. What are the possible causes of OBDII code P143A in a Buick?

- The code P143A in a Buick may be triggered by issues such as a faulty Reductant Control Module, damaged wiring, or a communication error within the system.

3. How can I diagnose the OBDII code P143A in my Buick?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the code, checking for any other related codes, and inspecting the Reductant Control System components for any visible damage.

4. Can I drive my Buick with OBDII code P143A present?

- While the vehicle may still be drivable with the code present, it's recommended to address the issue promptly to prevent potential long-term damage to the Reductant Control System.

5. How can I reset the OBDII code P143A in my Buick?

- Resetting the code can be done using an OBDII scanner by clearing the code after addressing the underlying issue causing the P143A fault.

6. Is it safe to ignore the OBDII code P143A in my Buick?

- Ignoring the code may lead to decreased fuel efficiency, increased emissions, and potential damage to the catalytic converter, so it is not recommended to ignore the issue.

7. What are some repair tips for fixing OBDII code P143A in a Buick?

- Repair tips may include checking and repairing any damaged wiring, replacing the Reductant Control Module if necessary, and ensuring all connections in the system are secure.

8. How much does it typically cost to fix OBDII code P143A in a Buick?

- The cost of fixing the P143A code can vary depending on the underlying issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can a DIY enthusiast fix OBDII code P143A in a Buick?

- While some aspects of diagnosing and fixing the issue may be DIY-friendly, dealing with the Reductant Control System and related components may require professional expertise to ensure proper repair.

10. How long does it usually take to repair OBDII code P143A in a Buick?

- The repair time for the P143A code can vary based on the specific cause and complexity of the issue, but it may take a few hours to a full day for a mechanic to diagnose and fix the problem.