P143B 2014 Chevrolet Silverado Code - Reductant Control System Information Signal Message Counter Incorrect
Quick Answer
The P143B diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado indicates that the Reductant Control System Information Signal Message Counter is incorrect. Common causes include Faulty DEF Sensor: A malfunctioning DEF sensor can cause communication errors within the reductant control system, DEF Contamination: Contaminated or low-quality DEF can lead to sensor malfunctions and trigger the P143B code, Wiring Issues: Corroded or damaged wiring connections between the components of the reductant system can disrupt communication. 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 2014 Chevrolet Silverado indicates Reductant Control System Information Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty DEF Sensor: A malfunctioning DEF sensor can cause communication errors within the reductant control system, DEF Contamination: Contaminated or low-quality DEF can lead to sensor malfunctions and trigger the P143B code, Wiring Issues: Corroded or damaged wiring connections between the components of the reductant system can disrupt communication.
- 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 P143B 2014 Chevrolet Silverado Description
The P143B diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado indicates that the Reductant Control System Information Signal Message Counter is incorrect. This code is related to the vehicle's emissions control system, specifically the Selective Catalytic Reduction (SCR) system. The SCR system is responsible for reducing harmful emissions by injecting a urea-based solution called diesel exhaust fluid (DEF) into the exhaust stream. The system uses sensors to monitor the DEF level and quality to ensure proper operation.
Common Causes of P143B 2014 Chevrolet Silverado
- Faulty DEF Sensor: A malfunctioning DEF sensor can cause communication errors within the reductant control system.
- DEF Contamination: Contaminated or low-quality DEF can lead to sensor malfunctions and trigger the P143B code.
- Wiring Issues: Corroded or damaged wiring connections between the components of the reductant system can disrupt communication.
- Software Glitch: An issue with the control module software can also cause incorrect message counts within the system.
Symptoms of P143B 2014 Chevrolet Silverado
- Check Engine Light: The most common symptom associated with the P143B code is the illumination of the Check Engine Light on the dashboard.
- Reduced Performance: The vehicle may experience reduced performance, including decreased power and acceleration.
- Poor Fuel Economy: A malfunctioning reductant control system can lead to poor fuel economy as the engine may not be operating at optimal efficiency.
- Failed Emissions Test: If the issue is not resolved, the vehicle may fail an emissions test due to increased emissions.
How to Fix P143B 2014 Chevrolet Silverado
- Diagnose the Issue: Use a diagnostic scanner to retrieve the specific fault codes and pinpoint the exact cause of the problem.
- Inspect DEF System Components: Check the DEF tank, pump, injector, and sensors for any signs of damage or contamination.
- Test Wiring Connections: Inspect the wiring harness for any loose, damaged, or corroded connections and repair as necessary.
- Update Software: If a software glitch is suspected, update the control module software to the latest version to resolve communication errors.
- Clear Codes and Test Drive: After completing the repairs, clear the fault codes from the system and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P143B 2014 Chevrolet Silverado
The typical repair costs for addressing a P143B code on a 2014 Chevrolet Silverado can range from $200 to $500. This estimate includes the cost of parts such as sensors, wiring harnesses, and DEF fluid, as well as labor charges. However, it's important to note that actual repair costs can vary depending on the specific diagnosis time and labor rates at auto repair shops. Rates can range from $80 to $150 per hour, with higher rates in metropolitan areas or at dealerships, and lower rates at independent shops. It's recommended to obtain quotes from local repair shops for a more accurate estimate.
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Frequently Asked Questions about P143B 2014 Chevrolet Silverado Code
1. What does the OBDII code P143B mean on a 2014 Chevrolet Silverado?
P143B indicates an issue with the reductant control system, specifically that the information signal message counter is incorrect, which may affect the diesel exhaust fluid (DEF) system.
2. What are the common symptoms of code P143B on a Chevrolet Silverado?
Symptoms may include a check engine light, DEF system warning messages, reduced engine performance, or a possible limp mode activation.
3. What causes the P143B code to appear on a 2014 Chevrolet Silverado?
The code is typically caused by issues like faulty reductant control module communication, a software glitch, damaged wiring, or a failing reductant control module.
4. Can a bad reductant control module cause the P143B code?
Yes, a malfunctioning reductant control module is one of the main causes of this code, as it may fail to send the proper signal message count.
5. How do you diagnose the P143B code on a Chevrolet Silverado?
Diagnosis involves scanning for codes, inspecting wiring and connectors for damage or corrosion, testing the reductant control module, and verifying module communication using a diagnostic scan tool.
6. Can a software update fix the P143B code on a 2014 Silverado?
Yes, in some cases, a software update from the manufacturer may resolve communication issues causing the code.
7. Is it safe to drive with code P143B active on a Chevrolet Silverado?
It’s not recommended to drive for extended periods with this code active, as it may lead to reduced engine performance or further DEF system issues.
8. How much does it cost to repair the P143B code on a 2014 Chevrolet Silverado?
Repair costs can range from $100 to $1,000 depending on whether the issue is minor, like fixing a wiring problem, or major, such as replacing the reductant control module.
9. What tools are needed to resolve the P143B code?
A diagnostic scan tool capable of reading and clearing OBDII codes, along with a multimeter for testing wiring, are essential tools for diagnosing and fixing this issue.
10. Can a DIYer fix the P143B code on their Silverado?
A skilled DIYer with the right tools and knowledge of the DEF system may be able to resolve the code by inspecting wiring and performing basic repairs, but module programming or software updates typically require professional assistance.
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