AutoCodes – Chevrolet – P143B Chevrolet

P143B Chevrolet Code - Reductant Control System Information 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: P143B Chevrolet indicates Reductant Control System Information 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 664

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 P143B Chevrolet 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 Information Signal Message Counter is Incorrect.

OBDII Code P143B Chevrolet - Reductant Control System Information Signal Message Counter Incorrect - AutoCodes.com — P143B Chevrolet Code - Reductant Control System Information Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P143B Chevrolet?

Faulty Reductant Control System

How to Fix the DTC P143B 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 P143B 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.

Need more information about the P143B Chevrolet code?

Need more information on how to fix the P143B Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P143B Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

P143B 2014 Chevrolet Silverado — Reductant Control System Information Signal Message Counter Incorrect
P143B 2015 Chevrolet Silverado — Reductant Control System Information Signal Message Counter Incorrect
P143B 2016 Chevrolet Silverado — Reductant Control System Information Signal Message Counter Incorrect
P143B 2017 Chevrolet Silverado — Reductant Control System Information Signal Message Counter Incorrect
P143B 2018 Chevrolet Silverado — Reductant Control System Information Signal Message Counter Incorrect

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 P143B Chevrolet Code

1. What are the common symptoms of OBDII code P143B in a Chevrolet vehicle?

- Common symptoms include the Check Engine Light (CEL) illuminating, reduced engine performance, and potential failures to pass emissions tests.

2. What does the OBDII code P143B Chevrolet mean?

- The code signifies that the Reductant Control System Information Signal Message Counter is reporting an incorrect value.

3. What are the possible causes of OBDII code P143B in a Chevrolet?

- Potential causes include a faulty reductant control module, wiring issues, sensor malfunctions, or software glitches.

4. How can I diagnose OBDII code P143B in my Chevrolet?

- Diagnosis typically involves using an OBDII scanner to read the code, checking the reductant control system components, and inspecting wiring connections for any issues.

5. How serious is OBDII code P143B in a Chevrolet?

- While the code may not cause immediate harm to the vehicle, it can lead to increased emissions and reduced fuel efficiency if left unresolved.

6. Can I drive my Chevrolet with OBDII code P143B?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to prevent potential long-term problems.

7. How do I reset OBDII code P143B in a Chevrolet?

- The code can be reset using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes.

8. What are some common repair tips for fixing OBDII code P143B in a Chevrolet?

- Repair tips may include checking and cleaning the reductant control system components, replacing faulty sensors, and ensuring proper wiring connections.

9. Can a DIY enthusiast fix OBDII code P143B in a Chevrolet?

- Depending on the root cause, some DIY enthusiasts with the necessary tools and skills may be able to address the issue themselves. Otherwise, professional help may be required.

10. How much does it cost to repair OBDII code P143B in a Chevrolet?

- The cost of repair can vary significantly depending on the specific cause of the code, parts needed, labor rates, and whether the repair is done at a dealership or an independent mechanic.