P142F GMC 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 GMC 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.
Code P142F 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 P142F 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 P142F 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 P142F 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 P142F GMC Code
1. What are the common symptoms of an OBDII code P142F in a GMC vehicle?
- Common symptoms include the check engine light coming on, decreased fuel efficiency, rough idling, and potential exhaust smoke.
2. What does the OBDII code P142F GMC indicate?
- The code P142F indicates that the Particulate Matter Sensor Control Module Temperature Sensor 2 has detected high voltage.
3. What are the possible causes of the P142F code in a GMC vehicle?
- Possible causes include a faulty temperature sensor, wiring issues, a malfunctioning control module, or a problem with the particulate matter sensor itself.
4. How can I diagnose the P142F code in my GMC vehicle?
- Diagnosis typically involves using an OBDII scanner to retrieve the code, checking the wiring and connections related to the temperature sensor, and testing the sensor's resistance.
5. Can I continue driving my GMC vehicle with the P142F code present?
- It is not recommended to drive your vehicle with the P142F code present, as it can lead to further damage and potentially affect the vehicle's performance.
6. What are some repair tips for fixing the P142F code in a GMC vehicle?
- Repair tips may include replacing the faulty temperature sensor, repairing any damaged wiring, resetting the code, or seeking professional help for further diagnosis.
7. How much does it typically cost to repair the P142F code in a GMC vehicle?
- The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.
8. Can a DIY enthusiast fix the P142F code in a GMC vehicle?
- Depending on the skill level and tools available, some DIY enthusiasts may be able to address the P142F code, especially if it involves simple tasks like sensor replacement or wiring repair.
9. Will resetting the code make the issue go away permanently?
- Resetting the code may temporarily clear the check engine light, but if the underlying issue causing the P142F code is not addressed, the code is likely to reappear.
10. Is the P142F code specific to GMC vehicles only?
- While the code P142F is associated with GMC vehicles, similar codes related to particulate matter sensors and temperature sensors may exist for other vehicle makes and models.
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