Engine-Codes.com
Engine-Codes – GMC – P147B 2015 GMC Sierra

P147B 2015 GMC Sierra Code - Particulate Matter Sensor Shunt Circuit High Current

Quick Answer

The diagnostic trouble code P147B for a 2015 GMC Sierra indicates a Particulate Matter Sensor Shunt Circuit High Current. Common causes include Faulty Particulate Matter Sensor: The sensor itself may be malfunctioning, leading to incorrect readings and triggering the P147B code, Wiring Issues: Damage or corrosion to the wiring connected to the sensor can disrupt the signal and cause a high current in the shunt circuit, ECM Malfunction: A problem with the engine control module (ECM) can also lead to the P147B code being triggered. 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
P147B 2015 GMC Sierra indicates Particulate Matter Sensor Shunt Circuit High Current.
Common causes
Common causes include Faulty Particulate Matter Sensor: The sensor itself may be malfunctioning, leading to incorrect readings and triggering the P147B code, Wiring Issues: Damage or corrosion to the wiring connected to the sensor can disrupt the signal and cause a high current in the shunt circuit, ECM Malfunction: A problem with the engine control module (ECM) can also lead to the P147B code being triggered.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P147B 2015 GMC Sierra Description

The diagnostic trouble code P147B for a 2015 GMC Sierra indicates a Particulate Matter Sensor Shunt Circuit High Current. This code is related to the vehicle's emissions control system, specifically the particulate matter sensor. The particulate matter sensor is responsible for monitoring the amount of soot or particulate matter in the exhaust gases of the vehicle.

OBDII Code P147B 2015 GMC Sierra - Particulate Matter Sensor Shunt Circuit High Current
P147B 2015 GMC Sierra Code - Particulate Matter Sensor Shunt Circuit High Current

Common Causes of P147B 2015 GMC Sierra

  1. Faulty Particulate Matter Sensor: The sensor itself may be malfunctioning, leading to incorrect readings and triggering the P147B code.
  2. Wiring Issues: Damage or corrosion to the wiring connected to the sensor can disrupt the signal and cause a high current in the shunt circuit.
  3. ECM Malfunction: A problem with the engine control module (ECM) can also lead to the P147B code being triggered.
  4. Exhaust System Leaks: Leaks in the exhaust system can affect the sensor's readings and cause the code to appear.

Symptoms of P147B 2015 GMC Sierra

  1. Check Engine Light: The most common symptom associated with the P147B code is the illumination of the check engine light on the vehicle's dashboard.
  2. Decreased Fuel Efficiency: A malfunctioning particulate matter sensor can cause the engine to run inefficiently, leading to decreased fuel efficiency.
  3. Rough Idle: The engine may experience rough idling or hesitation when the sensor is not functioning properly.
  4. Increased Emissions: The vehicle may produce higher emissions than usual due to inaccurate readings from the sensor.

How to Fix P147B 2015 GMC Sierra

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble code and perform further testing to pinpoint the exact cause of the high current in the shunt circuit.
  2. Inspect Wiring: Check the wiring connected to the particulate matter sensor for any damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Test Sensor: Test the functionality of the particulate matter sensor to determine if it is faulty and needs to be replaced.
  4. Check ECM: Inspect the engine control module (ECM) for any signs of malfunction. Reset or replace the ECM if necessary.
  5. Clear Codes: After making the necessary repairs, clear the trouble codes from the vehicle's memory and test drive to ensure the issue has been resolved.

Cost to Fix P147B 2015 GMC Sierra

The cost of repairing a Particulate Matter Sensor Shunt Circuit High Current issue can vary depending on the specific cause of the problem and the labor rates in your area. In general, the cost of parts for this repair can range from $100 to $300, with labor costs adding an additional $100 to $200. Overall, you can expect to pay between $200 and $500 for this repair. Keep in mind that labor rates at auto repair shops can vary, so it's a good idea to get quotes from multiple shops to find the best price.

Need more information about the P147B 2015 GMC Sierra code?

Need more information on how to fix the P147B 2015 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P147B 2015 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 P147B 2015 GMC Sierra Code

1. What does the OBDII code P147B mean on a 2015 GMC Sierra?

P147B indicates a "Particulate Matter Sensor Shunt Circuit High Current," meaning the engine control module (ECM) has detected excessive current in the particulate matter (PM) sensor shunt circuit.

2. What are the symptoms of the P147B code on a 2015 GMC Sierra?

Common symptoms include an illuminated check engine light, reduced engine performance, increased fuel consumption, and potential diesel particulate filter (DPF) regeneration issues.

3. What causes the P147B code to appear?

Possible causes include a faulty particulate matter sensor, damaged wiring or connectors in the sensor circuit, excessive soot buildup, or a malfunctioning ECM.

4. Can I drive with the P147B code on my 2015 GMC Sierra?

While the vehicle may still be drivable, ignoring the P147B code can lead to further damage to the DPF system and reduced fuel efficiency. It's best to address the issue promptly.

5. How do I diagnose the P147B code on my 2015 GMC Sierra?

Diagnosis typically involves inspecting the PM sensor and its wiring for damage, checking for soot buildup, and using a multimeter to test circuit continuity and current levels.

6. How can I fix the P147B code on my 2015 GMC Sierra?

Repairs may include replacing the particulate matter sensor, repairing damaged wiring or connectors, cleaning the DPF, or updating/reprogramming the ECM if necessary.

7. How much does it cost to fix the P147B code on a 2015 GMC Sierra?

Repair costs vary but typically range from $200 to $800, depending on whether the PM sensor, wiring, or DPF requires replacement or cleaning.

8. Can a dirty diesel particulate filter cause the P147B code?

Yes, excessive soot buildup in the DPF can lead to abnormal readings from the PM sensor, potentially triggering the P147B code.

9. What tools are needed to troubleshoot the P147B code?

You may need an OBDII scanner, a multimeter, and basic hand tools to inspect and test the PM sensor and its circuit.

10. Will a software update fix the P147B code on my 2015 GMC Sierra?

In some cases, a software update or reprogramming of the ECM may be required to resolve the issue, especially if it’s caused by incorrect sensor calibration.

Discuss the causes and fixes for P147B 2015 GMC Sierra OBDII Code

Submit a New Comment

Code P147B 2015 GMC Sierra comments

No comments found for this page.