P143B 2017 GMC Sierra Code - Reductant Control System Information Signal Message Counter Incorrect
Quick Answer
The diagnostic trouble code P143B in a 2017 GMC Sierra indicates that there is an issue with the Reductant Control System Information Signal Message Counter being incorrect. Common causes include Faulty Reductant Control Module: The module responsible for controlling the dosing of DEF may be malfunctioning, DEF Quality: If the DEF being used is contaminated or not of the proper quality, it can lead to issues with the SCR system, Wiring or Connection Issues: There may be a problem with the wiring or connections between the various components of the SCR 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 2017 GMC Sierra indicates Reductant Control System Information Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty Reductant Control Module: The module responsible for controlling the dosing of DEF may be malfunctioning, DEF Quality: If the DEF being used is contaminated or not of the proper quality, it can lead to issues with the SCR system, Wiring or Connection Issues: There may be a problem with the wiring or connections between the various components of the SCR 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 P143B 2017 GMC Sierra Description
The diagnostic trouble code P143B in a 2017 GMC Sierra indicates that there is an issue with the Reductant Control System Information Signal Message Counter being incorrect. In simpler terms, this code is related to the vehicle's emissions control system, specifically the system responsible for reducing harmful emissions. The Reductant Control System is part of the Selective Catalytic Reduction (SCR) system, which uses a urea-based solution (DEF - Diesel Exhaust Fluid) to convert nitrogen oxides (NOx) into harmless nitrogen and water vapor.
Common Causes of P143B 2017 GMC Sierra
- Faulty Reductant Control Module: The module responsible for controlling the dosing of DEF may be malfunctioning.
- DEF Quality: If the DEF being used is contaminated or not of the proper quality, it can lead to issues with the SCR system.
- Wiring or Connection Issues: There may be a problem with the wiring or connections between the various components of the SCR system.
- Sensor Malfunction: A sensor within the system may be sending incorrect signals, causing the counter to be incorrect.
- Software or Calibration Issue: There may be a software glitch or calibration problem within the system causing the error code.
Symptoms of P143B 2017 GMC Sierra
- Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
- Reduced Engine Performance: The vehicle may experience a loss of power or reduced acceleration due to the engine going into a protective mode.
- Increased Emissions: There may be an increase in emissions output from the vehicle.
- Poor Fuel Efficiency: A malfunctioning SCR system can lead to poor fuel efficiency as the engine may not be running optimally.
How to Fix P143B 2017 GMC Sierra
- Diagnose the Issue: Use a diagnostic scan tool to retrieve the specific trouble code and further diagnose the root cause of the problem.
- Check DEF Quality: Verify that the DEF being used is of the proper quality and not contaminated.
- Inspect Wiring and Connections: Thoroughly inspect the wiring and connections within the SCR system for any signs of damage or corrosion.
- Replace Reductant Control Module: If the module is found to be faulty, it will need to be replaced to restore proper operation of the system.
- Clear Codes and Test Drive: After completing the repair, clear the error codes from the vehicle's computer and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P143B 2017 GMC Sierra
The cost of repairing the Reductant Control System Information Signal Message Counter Incorrect code can vary depending on the specific cause of the issue. In general, the cost of parts for this repair can range from $200 to $500, while the labor cost can be in the range of $100 to $300. As mentioned earlier, labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate.
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Frequently Asked Questions about P143B 2017 GMC Sierra Code
What does OBDII code P143B mean for a 2017 GMC Sierra?
OBDII code P143B indicates that there is an issue with the reductant control system, specifically that the information signal message counter is incorrect, which may affect the vehicle's emissions control system.
What symptoms might indicate a P143B code?
Symptoms may include the check engine light being illuminated, reduced engine power, or issues with the vehicle's ability to pass emissions testing.
What are common causes of the P143B code?
Common causes include faulty reductant control modules, wiring issues, software glitches, or problems with the vehicle's emissions system components that communicate with the reductant system.
Can I drive my GMC Sierra with a P143B code?
While it may be possible to drive the vehicle, it is not recommended, as it could lead to reduced engine performance and may cause further damage to the emissions system.
How can I diagnose the P143B code?
To diagnose the P143B code, you should use an OBDII scanner to read the code, inspect the reductant control module and associated wiring for damage, and check for any software updates or technical service bulletins related to the issue.
What are some potential repairs for a P143B code?
Repairs may include replacing the reductant control module, repairing or replacing damaged wiring, updating the vehicle's software, or addressing any other underlying issues with the emissions control system.
Will clearing the code fix the problem?
Clearing the code may turn off the check engine light temporarily, but if the underlying issue is not resolved, the code is likely to return.
Is there a risk of damaging my vehicle if I ignore the P143B code?
Yes, ignoring the P143B code can lead to further complications, such as more serious emissions issues or damage to the engine, which could result in costly repairs.
Should I seek professional help for a P143B code?
If you are not experienced with automotive repair or diagnostics, it is advisable to seek professional help to properly diagnose and fix the issue related to the P143B code.
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