AutoCodes – Buick – P142C Buick

P142C Buick Code - Particulate Matter Sensor Control Module Temperature Sensor 1 Low Voltage

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: P142C Buick indicates Particulate Matter Sensor Control Module Temperature Sensor 1 Low Voltage.
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 418

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 Jul 25, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P142C Buick 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) when the Particular Matter Sensor Control Unit detects an internal electrical fault or an over-temperature condition on one of the internal temperature sensors.

OBDII Code P142C Buick - Particulate Matter Sensor Control Module Temperature Sensor 1 Low Voltage - AutoCodes.com — P142C Buick Code - Particulate Matter Sensor Control Module Temperature Sensor 1 Low Voltage

What does this mean?

What are the Possible Causes of the DTC P142C Buick?

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 P142C Buick?

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 P142C Buick 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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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 P142C Buick Code

1. What are the common symptoms of OBDII code P142C in a Buick related to the Particulate Matter Sensor Control Module Temperature Sensor 1 Low Voltage?

- Common symptoms include poor engine performance, reduced fuel efficiency, and possibly an illuminated check engine light.

2. What are the possible causes of OBDII code P142C in a Buick indicating an issue with the Particulate Matter Sensor Control Module Temperature Sensor 1 Low Voltage?

- Possible causes may include a faulty temperature sensor, wiring issues, a malfunctioning control module, or a problem with the sensor circuit.

3. How can I diagnose the OBDII code P142C in my Buick to determine if the Particulate Matter Sensor Control Module Temperature Sensor 1 Low Voltage is the issue?

- Use a diagnostic scanner to read the fault codes and perform a thorough inspection of the sensor, wiring, and control module for any visible damage or issues.

4. Is it safe to continue driving my Buick with the OBDII code P142C related to the Particulate Matter Sensor Control Module Temperature Sensor 1 Low Voltage?

- It is generally not recommended to drive the vehicle with this code present, as it can lead to further damage and worsen engine performance.

5. Can I repair the OBDII code P142C in my Buick related to the Particulate Matter Sensor Control Module Temperature Sensor 1 Low Voltage myself?

- Depending on your mechanical skills and tools available, you may be able to replace the faulty sensor, repair wiring issues, or reset the control module. However, seeking professional help is advisable for accurate diagnosis and repair.

6. Are there any specific maintenance tips to prevent OBDII code P142C from occurring in my Buick due to the Particulate Matter Sensor Control Module Temperature Sensor 1 Low Voltage?

- Regularly inspecting the sensor, wiring, and control module for any signs of wear or damage can help prevent this code from appearing. Additionally, following the manufacturer's recommended maintenance schedule is essential.

7. How much does it typically cost to repair OBDII code P142C in a Buick related to the Particulate Matter Sensor Control Module Temperature Sensor 1 Low Voltage?

- The cost of repair can vary depending on the specific issue causing the code, the labor rates in your area, and whether you choose to repair it yourself or take it to a professional mechanic.

8. Can a faulty Particulate Matter Sensor Control Module Temperature Sensor 1 Low Voltage affect the emissions of my Buick?

- Yes, a malfunctioning sensor can impact the emissions system of the vehicle, potentially leading to increased emissions and failing an emissions test.

9. How urgent is it to address OBDII code P142C indicating an issue with the Particulate Matter Sensor Control Module Temperature Sensor 1 Low Voltage in my Buick?

- It is recommended to address this code promptly to prevent any further damage to the engine and emissions system of the vehicle.

10. Will resetting the check engine light resolve OBDII code P142C related to the Particulate Matter Sensor Control Module Temperature Sensor 1 Low Voltage in my Buick?

- While resetting the check engine light may temporarily turn it off, it will not fix the underlying issue causing the code. It is crucial to diagnose and repair the problem to prevent it from reoccurring.