AutoCodes – Cadillac – P142F Cadillac

P142F Cadillac Code - Particulate Matter Sensor Control Module Temperature Sensor 2 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: P142F Cadillac indicates Particulate Matter Sensor Control Module Temperature Sensor 2 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 316

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 P142F Cadillac 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 P142F Cadillac - Particulate Matter Sensor Control Module Temperature Sensor 2 High Voltage - AutoCodes.com — P142F Cadillac Code - Particulate Matter Sensor Control Module Temperature Sensor 2 High Voltage

What does this mean?

What are the Possible Causes of the DTC P142F Cadillac?

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 P142F Cadillac?

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 P142F Cadillac 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 P142F Cadillac Code

1. What are the common symptoms of OBDII code P142F on a Cadillac related to the Particulate Matter Sensor Control Module Temperature Sensor 2 High Voltage?

The common symptoms include the check engine light coming on, decreased fuel efficiency, and potential issues with the vehicle's emission system.

2. What are the possible causes of OBDII code P142F Cadillac indicating Particulate Matter Sensor Control Module Temperature Sensor 2 High Voltage?

Potential causes of this code include a faulty temperature sensor, wiring issues, a malfunctioning control module, or problems with the particulate matter sensor itself.

3. How can I diagnose OBDII code P142F on my Cadillac?

Diagnosing this code typically involves using an OBDII scanner to read the code and then conducting further tests to pinpoint the exact cause, such as checking the condition of the temperature sensor, inspecting the wiring for any damage, and testing the control module.

4. Can I continue driving my Cadillac with OBDII code P142F present?

It is not recommended to continue driving with this code present, as it can lead to potential issues with the vehicle's emission system and may cause further damage if left unaddressed.

5. How can I repair OBDII code P142F related to the Particulate Matter Sensor Control Module Temperature Sensor 2 High Voltage on my Cadillac?

Repairing this code may involve replacing the faulty temperature sensor, repairing any damaged wiring, resetting the control module, or addressing any issues with the particulate matter sensor.

6. Will resetting the check engine light fix OBDII code P142F on my Cadillac?

Simply resetting the check engine light may temporarily clear the code, but it will not address the underlying issue causing the code to appear. It's important to diagnose and repair the root cause of the problem.

7. Are there any DIY tips for troubleshooting OBDII code P142F on a Cadillac?

While some basic checks like inspecting the wiring connections and ensuring the sensor is securely in place can be done DIY, diagnosing and repairing the specific components related to this code may require professional help.

8. How much does it typically cost to repair OBDII code P142F on a Cadillac?

The cost of repairing this code can vary depending on the exact cause of the issue, the parts needed for replacement, and labor costs. It's recommended to consult a mechanic for an accurate estimate.

9. Can a faulty Particulate Matter Sensor Control Module Temperature Sensor 2 affect the performance of my Cadillac?

Yes, a faulty sensor can impact the performance of your Cadillac, leading to issues like reduced fuel efficiency, rough idling, or problems with the emission system.

10. Is OBDII code P142F a common issue in Cadillac vehicles?

While not extremely common, OBDII code P142F related to the Particulate Matter Sensor Control Module Temperature Sensor 2 High Voltage can occur in Cadillac vehicles, especially in models equipped with advanced emission control systems.