P142E GMC 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 GMC 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.
Code P142E GMC Description
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.
What are the Possible Causes of the DTC P142E 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 P142E 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 P142E 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.
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Frequently Asked Questions about P142E GMC Code
1. What are the common symptoms of OBDII code P142E GMC?
The common symptoms of OBDII code P142E GMC include poor engine performance, reduced fuel efficiency, and an illuminated check engine light.
2. What does the OBDII code P142E GMC indicate?
The OBDII code P142E GMC indicates a low voltage condition detected in Temperature Sensor 2 of the Particulate Matter Sensor Control Module.
3. What are the possible causes of OBDII code P142E GMC?
Possible causes of OBDII code P142E GMC include a faulty temperature sensor, wiring issues, a malfunctioning sensor control module, or a problem with the vehicle's electrical system.
4. How can I diagnose the OBDII code P142E GMC?
Diagnosing OBDII code P142E GMC involves using a diagnostic scanner to retrieve the code, checking the temperature sensor and wiring for faults, and testing the sensor control module for proper functioning.
5. Can I still drive my vehicle with OBDII code P142E GMC?
It is not recommended to drive your vehicle with OBDII code P142E GMC, as it can lead to further damage to the engine or emissions system. It is best to address the issue promptly.
6. How can I repair OBDII code P142E GMC?
Repairing OBDII code P142E GMC may involve replacing the faulty temperature sensor, repairing any damaged wiring, or replacing the sensor control module if necessary.
7. Are there any DIY tips for fixing OBDII code P142E GMC?
DIY tips for fixing OBDII code P142E GMC include checking the sensor's wiring connections, ensuring proper sensor operation, and following the manufacturer's repair procedures.
8. Can a mechanic help me fix OBDII code P142E GMC?
Yes, a qualified mechanic can help diagnose and repair OBDII code P142E GMC using specialized tools and expertise to address the specific issue causing the fault code.
9. How urgent is it to address OBDII code P142E GMC?
It is important to address OBDII code P142E GMC promptly to prevent potential engine or emissions system damage and ensure your vehicle operates efficiently and meets emissions standards.
10. Is OBDII code P142E GMC a common issue in GMC vehicles?
While OBDII code P142E GMC may not be as common as some other codes, it can still occur in GMC vehicles equipped with particulate matter sensors and related control modules.
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