P147B 2017 GMC Sierra Code - Particulate Matter Sensor Shunt Circuit High Current
Quick Answer
The Particulate Matter (PM) sensor monitors the amount of the particulates (soot) in the diesel exhaust gas exiting the tailpipe. Common causes include Faulty Exhaust Particulate Matter Sensor, Exhaust Particulate Matter Sensor harness is open or shorted, Exhaust Particulate Matter Sensor circuit poor electrical connection. 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 2017 GMC Sierra indicates Particulate Matter Sensor Shunt Circuit High Current.
- Common causes
- Common causes include Faulty Exhaust Particulate Matter Sensor, Exhaust Particulate Matter Sensor harness is open or shorted, Exhaust Particulate Matter Sensor circuit poor electrical connection.
- 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 P147B 2017 GMC Sierra Description
The operation of the PM Sensor is based on the electrical conductivity characteristic of the diesel particulate. As the exhaust gas flows over the sensing element, soot is absorbed in the combs between the electrodes, eventually creating a conductive path. When the path is formed, it generates a current based on the voltage being applied to the element. The measurement process continues until a preset current value is reached. To avoid misleading readings, the sensor performs a regeneration where the soot is cleaned off by heating up the element before the measurement phase begins. The amount of regenerations is based on vehicle strategy; when the calibrated number of regenerations is reached, the cumulative current readings are used to determine the amount of soot concentration in the exhaust gas which in turn determines the collection efficiency of the Diesel Particulate Filter (DPF).
The Diagnostic Trouble Code (DTC) will be set when the particular matter sensor control unit detects a fault in the particulate matter sensor circuitry.
What are the Possible Causes of the DTC P147B 2017 GMC Sierra?
- Faulty Exhaust Particulate Matter Sensor
- Exhaust Particulate Matter Sensor harness is open or shorted
- Exhaust Particulate Matter Sensor circuit poor electrical connection
How to Fix the DTC P147B 2017 GMC Sierra?
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 P147B 2017 GMC Sierra 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 P147B 2017 GMC Sierra code?
Need more information on how to fix the P147B 2017 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P147B 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P147B 2017 GMC Sierra Code
What does the OBDII code P147B mean on a 2017 GMC Sierra?
The P147B code indicates a "Particulate Matter Sensor Shunt Circuit High Current," meaning there is an electrical issue in the particulate matter sensor circuit.
What are the common symptoms of the P147B code?
Symptoms may include an illuminated check engine light, reduced engine performance, increased exhaust emissions, and potential limp mode activation.
What causes the P147B code to appear?
Common causes include a short circuit or high current in the particulate matter sensor wiring, a faulty particulate matter sensor, or issues with the engine control module (ECM).
How do I diagnose the P147B code?
Diagnosis involves checking the particulate matter sensor and its wiring for damage, testing the circuit for shorts or high current, and using a scan tool to monitor sensor data.
Can a damaged particulate matter sensor cause the P147B code?
Yes, a damaged or faulty particulate matter sensor is a common cause of this code and should be inspected and tested.
Is it safe to drive with the P147B code?
Driving with this code may lead to increased emissions or engine performance issues and should be addressed promptly to avoid further damage.
How can I fix the P147B code on my GMC Sierra?
Repairs may involve replacing the particulate matter sensor, repairing damaged wiring, or addressing ECM issues if necessary.
Do I need to replace the ECM if I get the P147B code?
Not necessarily. The ECM should only be replaced if all other potential causes, such as wiring and the sensor itself, have been ruled out.
What tools are needed to troubleshoot the P147B code?
You will need a scan tool, a digital multimeter, and potentially a wiring diagram for the particulate matter sensor circuit.
Can a software update fix the P147B code?
In some cases, a software update for the ECM may resolve the issue, but this is less common and should be considered after mechanical and wiring checks.
Discuss the causes and fixes for P147B 2017 GMC Sierra OBDII Code
Code P147B 2017 GMC Sierra 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.
