AutoCodes – GMC – P142D GMC

P142D GMC Code - Particulate Matter Sensor Control Module Temperature Sensor 1 High 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: P142D GMC indicates Particulate Matter Sensor Control Module Temperature Sensor 1 High 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 366

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 P142D GMC 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 P142D GMC - Particulate Matter Sensor Control Module Temperature Sensor 1 High Voltage - AutoCodes.com — P142D GMC Code - Particulate Matter Sensor Control Module Temperature Sensor 1 High Voltage

What does this mean?

What are the Possible Causes of the DTC P142D GMC?

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 P142D GMC?

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 P142D GMC 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 P142D GMC code?

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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 P142D GMC Code

1. What are the common symptoms of OBDII code P142D GMC?

The common symptoms of code P142D GMC may include the Check Engine Light coming on, reduced engine performance, and poor fuel efficiency.

2. What can cause the Particulate Matter Sensor Control Module Temperature Sensor 1 High Voltage code to trigger?

This code can be triggered by a faulty particulate matter sensor control module, a malfunctioning temperature sensor, wiring issues, or corrosion in the sensor connections.

3. How serious is the P142D GMC trouble code?

While the severity can vary, it is important to address this code promptly to prevent potential damage to the emissions control system and ensure optimal engine performance.

4. How can I diagnose the cause of the P142D GMC code?

Diagnosing the P142D code typically involves using a diagnostic scanner to retrieve the specific fault code, testing the particulate matter sensor control module and temperature sensor, and inspecting the sensor wiring and connections for any issues.

5. Can I drive my vehicle with the P142D GMC trouble code?

It is generally not recommended to drive the vehicle with an active P142D code, as it can lead to increased emissions and potential engine performance issues. It is best to address the underlying problem as soon as possible.

6. How can I repair the Particulate Matter Sensor Control Module Temperature Sensor 1 High Voltage code?

Repairing the P142D code may involve replacing the faulty particulate matter sensor control module or temperature sensor, repairing any damaged wiring or connections, and clearing the trouble code with a diagnostic scanner.

7. Can a DIY enthusiast fix the P142D GMC code?

While some DIY enthusiasts may be able to address the P142D code themselves, it is recommended to have the issue diagnosed and repaired by a certified mechanic to ensure proper resolution and prevent further complications.

8. How much does it typically cost to repair the P142D GMC trouble code?

The cost of repairing the P142D code can vary depending on the extent of the issue, the parts needed for replacement, and the labor rates of the repair shop. It is advisable to obtain quotes from different mechanics for an accurate estimate.

9. Are there any preventive measures to avoid the P142D GMC trouble code?

Regular maintenance of the emissions control system, including checking and cleaning the sensors, can help prevent issues like the P142D code. Additionally, driving responsibly and avoiding harsh driving conditions can also help maintain the system's health.

10. Can the P142D GMC trouble code affect my vehicle's emissions test results?

Yes, the P142D code can impact your vehicle's emissions test results, potentially causing it to fail the test. It is important to address the issue and ensure proper functioning of the emissions control system before undergoing an emissions test.