AutoCodes – Cadillac – P142E Cadillac

P142E Cadillac Code - Particulate Matter Sensor Control Module Temperature Sensor 2 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: P142E Cadillac indicates Particulate Matter Sensor Control Module Temperature Sensor 2 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 343

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 P142E 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 P142E Cadillac - Particulate Matter Sensor Control Module Temperature Sensor 2 Low Voltage - AutoCodes.com — P142E Cadillac Code - Particulate Matter Sensor Control Module Temperature Sensor 2 Low Voltage

What does this mean?

What are the Possible Causes of the DTC P142E 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 P142E 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 P142E 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 P142E Cadillac Code

1. What are the common symptoms of OBDII code P142E in a Cadillac related to the Particulate Matter Sensor Control Module Temperature Sensor 2 Low Voltage?

- Common symptoms include poor engine performance, decreased fuel efficiency, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P142E in a Cadillac indicating an issue with the Particulate Matter Sensor Control Module Temperature Sensor 2 Low Voltage?

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

3. How can I diagnose OBDII code P142E in a Cadillac related to the Particulate Matter Sensor Control Module Temperature Sensor 2 Low Voltage?

- Diagnosis typically involves using an OBDII scanner to read the code, inspecting the sensor and module for any visible damage, and testing the sensor's voltage and resistance.

4. Is it safe to continue driving with OBDII code P142E in a Cadillac due to the Particulate Matter Sensor Control Module Temperature Sensor 2 Low Voltage issue?

- It is not recommended to continue driving with this code, as it can lead to further damage to the engine and emissions system. It is best to address the issue promptly.

5. How can I repair OBDII code P142E in a Cadillac indicating a problem with the Particulate Matter Sensor Control Module Temperature Sensor 2 Low Voltage?

- Repairs may involve replacing the temperature sensor, repairing any damaged wiring, resetting the control module, or addressing any underlying issues causing the low voltage reading.

6. Can I reset the check engine light after fixing OBDII code P142E in a Cadillac related to the Particulate Matter Sensor Control Module Temperature Sensor 2 Low Voltage?

- Yes, after the issue has been resolved, you can reset the check engine light using an OBDII scanner or by disconnecting the car's battery for a few minutes.

7. Are there any preventative maintenance steps to avoid OBDII code P142E in a Cadillac associated with the Particulate Matter Sensor Control Module Temperature Sensor 2 Low Voltage?

- Regularly inspecting and maintaining the sensors, modules, and wiring in the emissions system can help prevent issues like P142E from occurring.

8. How long does it typically take to repair OBDII code P142E in a Cadillac due to the Particulate Matter Sensor Control Module Temperature Sensor 2 Low Voltage issue?

- The repair time can vary depending on the exact cause of the problem. It may take anywhere from 1-3 hours to diagnose and fix the issue.

9. Can a DIY enthusiast with some automotive knowledge repair OBDII code P142E in a Cadillac related to the Particulate Matter Sensor Control Module Temperature Sensor 2 Low Voltage?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address this code themselves by following repair guides and tutorials.

10. Will OBDII code P142E in a Cadillac related to the Particulate Matter Sensor Control Module Temperature Sensor 2 Low Voltage affect the vehicle's emissions compliance?

- Yes, this code indicates a problem with the emissions control system, so it is important to address it to ensure the vehicle remains compliant with emissions regulations.