AutoCodes – Chevrolet – P147B 2018 Chevrolet Silverado

P147B 2018 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 2018 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.

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Code Popularity 654

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Oct 01, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P147B 2018 Chevrolet Silverado Description

The Particulate Matter (PM) sensor monitors the amount of the particulates (soot) in the diesel exhaust gas exiting the tailpipe. The PM sensor is similar to the heated oxygen sensor with a ceramic element but also includes an individually calibrated Sensor Control Unit (SCU). The sensing element includes comb-shaped Interdigital Electrodes (IDE), a heater and a positive temperature coefficient resistor for temperature measurement.
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.

OBDII Code P147B 2018 Chevrolet Silverado - Particulate Matter Sensor Shunt Circuit High Current - AutoCodes.com — P147B 2018 Chevrolet Silverado Code - Particulate Matter Sensor Shunt Circuit High Current

What does this mean?

What are the Possible Causes of the DTC P147B 2018 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 2018 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 2018 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.

Need more information about the P147B 2018 Chevrolet Silverado code?

Need more information on how to fix the P147B 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 2018 Chevrolet Silverado Code

1. What are common symptoms of the OBDII code P147B in a 2018 Chevrolet Silverado?

- Common symptoms include the check engine light illuminating, reduced engine performance, increased fuel consumption, and potential issues with the exhaust system.

2. What does the OBDII code P147B "Particulate Matter Sensor Shunt Circuit High Current" mean in a 2018 Chevrolet Silverado?

- This code indicates that the particulate matter sensor shunt circuit is experiencing a higher-than-normal current flow, which can affect the proper functioning of the sensor.

3. What are possible causes of the P147B code in a 2018 Chevrolet Silverado?

- Possible causes include a faulty particulate matter sensor, damaged wiring or connectors in the sensor circuit, a defective sensor module, or issues with the vehicle's electronic control unit (ECU).

4. How can I diagnose the P147B code in my 2018 Chevrolet Silverado?

- Diagnosis typically involves using an OBDII scanner to retrieve the trouble codes, inspecting the particulate matter sensor and its circuit for any visible damage, and conducting electrical tests to pinpoint the issue.

5. Can I continue driving my 2018 Chevrolet Silverado with the P147B code present?

- It is not recommended to drive the vehicle with the P147B code, as it can lead to further damage and potentially affect the vehicle's emissions system and overall performance.

6. How can I repair the P147B code in my 2018 Chevrolet Silverado?

- Repairing the P147B code involves addressing the specific cause, which may include replacing the particulate matter sensor, repairing damaged wiring or connectors, or reprogramming the ECU to resolve the issue.

7. Is the repair for the P147B code in a 2018 Chevrolet Silverado something I can do myself?

- The repair for the P147B code may require advanced diagnostic tools and knowledge of automotive electrical systems, so it is recommended to consult a professional mechanic for accurate diagnosis and repair.

8. Are there any preventive measures to avoid the P147B code in a 2018 Chevrolet Silverado?

- Regular maintenance checks, including inspecting the exhaust system, monitoring fuel quality, and addressing any warning lights promptly, can help prevent issues that may trigger the P147B code.

9. How much does it typically cost to repair the P147B code in a 2018 Chevrolet Silverado?

- The cost of repair for the P147B code can vary depending on the underlying cause, parts needed, and labor costs, so it is advisable to obtain quotes from auto repair shops for an accurate estimate.

10. Can resetting the OBDII system clear the P147B code in a 2018 Chevrolet Silverado?

- While resetting the OBDII system may temporarily clear the code, it is crucial to diagnose and address the root cause of the issue to prevent the code from reoccurring.