P147B 2016 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 2016 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 2016 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 2016 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 2016 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 2016 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.
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Frequently Asked Questions about P147B 2016 GMC Sierra Code
1. What does the OBDII code P147B mean for a 2016 GMC Sierra?
It indicates a problem with the particulate matter sensor shunt circuit, specifically detecting high current.
2. What are the common symptoms of code P147B in a 2016 GMC Sierra?
Symptoms may include the check engine light turning on, reduced fuel efficiency, and potential issues with emissions control.
3. What causes code P147B to appear in a 2016 GMC Sierra?
Likely causes include a faulty particulate matter sensor, damaged wiring or connectors, or a short in the sensor's circuit.
4. Can driving with code P147B damage my 2016 GMC Sierra?
Driving with this code may lead to increased emissions and could potentially damage the exhaust system if not addressed promptly.
5. How do I diagnose code P147B on my GMC Sierra?
Use a diagnostic scanner to confirm the code, inspect the particulate matter sensor, and check associated wiring and connectors for damage.
6. Is replacing the particulate matter sensor necessary for code P147B?
Not always; first, inspect and repair any damaged wiring or connectors. Replace the sensor only if it's confirmed to be faulty.
7. How much does it cost to repair code P147B on a 2016 GMC Sierra?
Costs vary depending on whether only wiring repairs are needed or the particulate matter sensor requires replacement, typically ranging from $200 to $500.
8. Can a dirty particulate matter sensor trigger code P147B?
While uncommon, excessive soot buildup around the sensor may contribute to circuit issues and should be cleaned during diagnosis.
9. What tools are needed to fix code P147B on a GMC Sierra?
Basic tools include a diagnostic scanner, multimeter for electrical testing, and potentially replacement wiring or a new sensor.
10. Does code P147B affect emissions testing for a 2016 GMC Sierra?
Yes, this code can prevent the vehicle from passing emissions tests due to a malfunction in the particulate matter monitoring system.
Discuss the causes and fixes for P147B 2016 GMC Sierra OBDII Code
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