AutoCodes – Chevrolet – P147B Chevrolet

P147B Chevrolet 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 Chevrolet 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 7,339

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 Sep 30, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC P147B Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet code?

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

Need Help with the Code?

Get the P147B Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

P147B 2014 Chevrolet Silverado — Particulate Matter Sensor Shunt Circuit High Current
P147B 2015 Chevrolet Silverado — Particulate Matter Sensor Shunt Circuit High Current
P147B 2016 Chevrolet Silverado — Particulate Matter Sensor Shunt Circuit High Current
P147B 2017 Chevrolet Silverado — Particulate Matter Sensor Shunt Circuit High Current
P147B 2018 Chevrolet Silverado — Particulate Matter Sensor Shunt Circuit High Current

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 Chevrolet Code

1. What are common symptoms of OBDII code P147B (Chevrolet) related to the Particulate Matter Sensor Shunt Circuit High Current?

- Common symptoms include the check engine light being illuminated, decreased fuel efficiency, and potential issues with the vehicle's emissions system.

2. What could cause the Particulate Matter Sensor Shunt Circuit High Current fault code P147B in a Chevrolet vehicle?

- Possible causes may include a faulty particulate matter sensor, damaged wiring or connectors in the shunt circuit, or issues with the engine control module (ECM).

3. How serious is the P147B fault code in a Chevrolet vehicle?

- While the vehicle may still be driveable with this fault, it is important to address it promptly to prevent potential damage to the emissions system and ensure optimal engine performance.

4. How can I diagnose the Particulate Matter Sensor Shunt Circuit High Current issue (P147B) in my Chevrolet?

- Diagnosis typically involves using an OBDII scanner to retrieve the fault code, inspecting the sensor and related wiring for damage, and testing the circuit for proper voltage and continuity.

5. Is it safe to continue driving my Chevrolet with the P147B fault code present?

- It is generally not recommended to ignore the fault code and continue driving, as it could lead to increased emissions, reduced fuel efficiency, and potential long-term damage to the vehicle's emissions system.

6. Can I repair the Particulate Matter Sensor Shunt Circuit High Current fault code (P147B) in my Chevrolet myself?

- While some DIY enthusiasts may attempt to address this issue, it is recommended to have a professional mechanic diagnose and repair the problem to ensure it is properly resolved.

7. How much does it typically cost to repair the P147B fault code in a Chevrolet?

- The cost of repairs can vary depending on the exact cause of the issue, but it may involve replacing the particulate matter sensor, repairing damaged wiring, or reprogramming the engine control module (ECM).

8. Are there any maintenance tips to prevent the Particulate Matter Sensor Shunt Circuit High Current fault code in a Chevrolet?

- Regularly servicing the vehicle, including checking the emissions system and sensors, can help prevent issues like the P147B fault code from occurring.

9. Can a faulty particulate matter sensor cause other issues besides the P147B fault code in a Chevrolet?

- Yes, a faulty particulate matter sensor can potentially cause a variety of performance and emissions-related issues, so it is important to address any sensor problems promptly.

10. Will resetting the check engine light clear the P147B fault code in a Chevrolet?

- Resetting the check engine light may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to return. It is best to diagnose and repair the root cause of the problem.