P147B 2017 Chevrolet Silverado 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 Chevrolet Silverado 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 Chevrolet Silverado 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 Chevrolet Silverado?
- 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 Chevrolet Silverado?
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 Chevrolet Silverado 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 2017 Chevrolet Silverado Code
What does the OBDII code P147B mean for a 2017 Chevrolet Silverado?
The OBDII code P147B indicates that there is a high current detected in the particulate matter sensor shunt circuit, which can affect the vehicle's emissions control system.
What are the common symptoms of the P147B code?
Common symptoms include the check engine light illuminated, reduced engine performance, increased emissions, and possible issues with the diesel particulate filter (DPF).
What can cause the P147B code to trigger?
The code can be triggered by a faulty particulate matter sensor, wiring issues (such as shorts or breaks), poor connections, or problems with the engine control module (ECM).
How can I diagnose the P147B code?
To diagnose the P147B code, use an OBDII scanner to confirm the code, inspect the wiring and connectors for damage, test the particulate matter sensor for proper operation, and check for other related codes.
What is the recommended repair for the P147B code?
Recommended repairs may include replacing a faulty particulate matter sensor, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the ECM if necessary.
Can I drive my 2017 Chevrolet Silverado with the P147B code?
While you may be able to drive the vehicle, it is not advisable, as the code indicates a problem with the emissions system that could lead to increased emissions and potential legal issues.
Will clearing the P147B code fix the problem?
Clearing the code may turn off the check engine light temporarily, but the underlying issue must be resolved for the code not to return.
How much does it typically cost to repair the P147B code?
Repair costs can vary widely depending on the cause, ranging from a simple wiring fix that may cost around $100 to a complete sensor replacement, which could be $200-$400 or more.
Is the P147B code specific to diesel engines?
Yes, the P147B code is typically associated with diesel engines, particularly due to the use of particulate matter sensors in the diesel particulate filter system.
Discuss the causes and fixes for P147B 2017 Chevrolet Silverado OBDII Code
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