P143A 2015 Chevrolet Silverado Code - Reductant Control System Diagnostic Signal Message Counter Incorrect
Quick Answer
The P143A diagnostic trouble code (DTC) for a 2015 Chevrolet Silverado indicates a problem with the Reductant Control System Diagnostic Signal Message Counter being incorrect. Common causes include Faulty Reductant Control Module: A malfunctioning control module can disrupt communication signals within the Reductant Control System, Wiring Issues: Corrosion, damage, or poor connections in the wiring harness can lead to communication errors between components, DEF Quality: Low-quality or contaminated DEF can cause issues with the 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 2015 Chevrolet Silverado indicates Reductant Control System Diagnostic Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty Reductant Control Module: A malfunctioning control module can disrupt communication signals within the Reductant Control System, Wiring Issues: Corrosion, damage, or poor connections in the wiring harness can lead to communication errors between components, DEF Quality: Low-quality or contaminated DEF can cause issues with the 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P143A 2015 Chevrolet Silverado Description
The P143A diagnostic trouble code (DTC) for a 2015 Chevrolet Silverado indicates a problem with the Reductant Control System Diagnostic Signal Message Counter being incorrect. In vehicles equipped with Selective Catalytic Reduction (SCR) systems, such as diesel engines, the Reductant Control System is responsible for injecting a urea-based solution (DEF - Diesel Exhaust Fluid) into the exhaust stream to reduce harmful emissions. The system monitors various parameters to ensure proper operation, including the message counter that tracks communication signals between components.
Common Causes of P143A 2015 Chevrolet Silverado
- Faulty Reductant Control Module: A malfunctioning control module can disrupt communication signals within the Reductant Control System.
- Wiring Issues: Corrosion, damage, or poor connections in the wiring harness can lead to communication errors between components.
- DEF Quality: Low-quality or contaminated DEF can cause issues with the Reductant Control System.
- Sensor Malfunction: A faulty sensor responsible for monitoring DEF levels or injection rates can trigger this code.
- Software Glitch: Occasionally, a software glitch in the vehicle's control module can cause communication errors within the system.
Symptoms of P143A 2015 Chevrolet Silverado
- Check Engine Light: The most common symptom associated with this code is the illumination of the Check Engine Light on the dashboard.
- Reduced Fuel Efficiency: Incorrect dosing of DEF can lead to decreased fuel efficiency as the engine may not be operating at optimal conditions.
- Poor Engine Performance: In severe cases, the vehicle may experience rough idling, hesitation, or even stalling due to improper emission control.
- Failed Emissions Test: If the issue is not addressed, the vehicle may fail emissions tests due to increased emissions output.
How to Fix P143A 2015 Chevrolet Silverado
- Diagnose the Issue: Use a diagnostic scanner to retrieve the specific trouble code and perform a thorough inspection of the Reductant Control System components.
- Check Wiring and Connections: Inspect the wiring harness for any damage, corrosion, or loose connections. Repair or replace as necessary.
- Test Sensors: Verify the functionality of sensors related to DEF injection and monitoring. Replace any faulty sensors.
- Update Software: If a software glitch is suspected, updating the control module software to the latest version may resolve the communication errors.
- Clear Codes and Test Drive: After completing repairs, clear the DTCs from the vehicle's memory and test drive to ensure the issue has been resolved.
Cost to Fix P143A 2015 Chevrolet Silverado
The typical repair costs for addressing a P143A code on a 2015 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, parts such as sensors or wiring harnesses may cost between $100 to $300, while labor charges can range from $100 to $300. Overall, the total repair cost could fall within the $200 to $600 range. However, it's important to note that diagnosis time and labor rates at auto repair shops can fluctuate based on location, vehicle make and model, and engine type. It's recommended to obtain quotes from local shops for a more accurate estimate. Keep in mind that rates at dealerships or in metropolitan areas may be higher, while independent shops might offer more competitive pricing.
Need more information about the P143A 2015 Chevrolet Silverado code?
Need more information on how to fix the P143A 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P143A 2015 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P143A 2015 Chevrolet Silverado Code
1. What does the OBDII code P143A mean on a 2015 Chevrolet Silverado?
P143A indicates an issue with the Reductant Control System, specifically a diagnostic signal message counter that is incorrect or inconsistent.
2. What are the symptoms of code P143A in a 2015 Chevrolet Silverado?
Common symptoms include a check engine light, possible DEF (Diesel Exhaust Fluid) system warnings, and reduced engine performance in severe cases.
3. What causes the P143A code to appear?
The code is often caused by a malfunction in the reductant control module, communication errors between the module and the ECM, or a software issue.
4. Can a bad reductant tank sensor cause the P143A code?
Yes, a faulty reductant tank sensor or wiring can disrupt communication and trigger this code.
5. How do I fix the P143A code on my 2015 Chevy Silverado?
Repairs may include reprogramming the reductant control module, inspecting and repairing wiring, or replacing the defective module or sensors.
6. Is the P143A code related to the DEF system?
Yes, the P143A code is directly related to the DEF system, which manages diesel emissions using reductant fluid.
7. Can I drive my Silverado with the P143A code?
You may be able to drive short distances, but ignoring the issue could lead to reduced engine power or further damage to the emission system.
8. How is the P143A code diagnosed?
A mechanic will use a scan tool to check for related codes, inspect the reductant control module, and test the wiring and sensors in the DEF system.
9. Does the P143A code require module reprogramming?
In some cases, updating or reprogramming the reductant control module software can resolve the issue.
10. What is the cost to fix the P143A code on a 2015 Silverado?
The repair cost can vary but typically ranges from $150 to $1,000, depending on whether reprogramming, wiring repair, or component replacement is needed.
Discuss the causes and fixes for P143A 2015 Chevrolet Silverado OBDII Code
Code P143A 2015 Chevrolet Silverado comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.