P143A GMC 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 GMC 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.
Code P143A GMC Description
What are the Possible Causes of the DTC P143A GMC?
- Faulty Reductant Control System
How to Fix the DTC P143A 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 P143A 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.
Need more information about the P143A GMC code?
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Need Help with the Code?
Get the P143A GMC code diagnosed by a professional: Find a repair shop in your area
Information for Specific GMC Models
- P143A 2014 GMC Sierra — Reductant Control System Diagnostic Signal Message Counter Incorrect
- P143A 2015 GMC Sierra — Reductant Control System Diagnostic Signal Message Counter Incorrect
- P143A 2016 GMC Sierra — Reductant Control System Diagnostic Signal Message Counter Incorrect
- P143A 2017 GMC Sierra — Reductant Control System Diagnostic Signal Message Counter Incorrect
- P143A 2018 GMC Sierra — Reductant Control System Diagnostic Signal Message Counter Incorrect
Frequently Asked Questions about P143A GMC Code
What does the OBDII code P143A mean for my GMC?
The OBDII code P143A indicates that there is an issue with the reductant control system, specifically that the diagnostic signal message counter is incorrect, which can affect the performance of the emissions control system.
What symptoms might I experience with the P143A code?
Common symptoms include reduced engine performance, a warning light on the dashboard, and potential issues with the vehicle's emissions system, which could lead to increased emissions.
What are the common causes of the P143A code?
The P143A code can be triggered by issues such as a malfunctioning reductant control module, faulty wiring or connectors in the reductant system, or software issues in the vehicle's engine control module (ECM).
How can I diagnose the P143A code?
To diagnose the P143A code, use an OBDII scanner to confirm the code, inspect the reductant control system for any physical damage, check wiring and connectors for faults, and consider updating the vehicle's ECM software if applicable.
What repairs are recommended for the P143A code?
Repairs may include replacing the reductant control module, repairing any damaged wiring or connectors, and reprogramming or updating the ECM if necessary. Always address any underlying issues causing the code to appear.
Can I drive my GMC with the P143A code?
While it may be possible to drive the vehicle, it is not recommended as it could lead to decreased performance and increased emissions, potentially causing further damage to the vehicle’s emissions system.
Will clearing the P143A code fix the problem?
Clearing the code may temporarily remove the warning light, but it will not fix the underlying issue. The code is likely to return if the root cause is not addressed.
Is the P143A code serious?
Yes, the P143A code can indicate a problem with the emissions control system, which can lead to increased emissions and potential legal issues related to emissions compliance, so it should be diagnosed and repaired promptly.
Can I fix the P143A code myself?
If you have experience with automotive repairs and diagnostics, you may be able to troubleshoot and fix the issue by inspecting the reductant control system and making necessary repairs. Otherwise, it’s advisable to consult a professional mechanic.
Discuss the causes and fixes for P143A GMC OBDII Code
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