P142C GMC Code - Particulate Matter Sensor Control Module Temperature Sensor 1 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
- P142C GMC indicates Particulate Matter Sensor Control Module Temperature Sensor 1 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 P142C 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 P142C 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 P142C 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 P142C 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 P142C GMC Code
1. What are the common symptoms of OBDII code P142C GMC?
Common symptoms of code P142C GMC may include engine performance issues, decreased fuel efficiency, and the illumination of the check engine light.
2. What does the OBDII code P142C GMC indicate?
The code P142C GMC specifically indicates an issue with the Particulate Matter Sensor Control Module Temperature Sensor 1 showing low voltage.
3. What are possible causes of the Particulate Matter Sensor Control Module Temperature Sensor 1 low voltage issue?
Possible causes for the low voltage issue with the Particulate Matter Sensor Control Module Temperature Sensor 1 include a faulty sensor, wiring issues, or a problem with the control module.
4. How can I diagnose the cause of OBDII code P142C GMC?
Diagnosing the cause of code P142C GMC typically involves using a scan tool to retrieve the code, inspecting the wiring and sensor connections, and testing the sensor's voltage output.
5. How serious is OBDII code P142C GMC?
While the severity of the issue can vary, it's important to address code P142C GMC promptly to prevent potential damage to the vehicle's emissions system and ensure optimal engine performance.
6. Can I continue driving with OBDII code P142C GMC present?
It is not recommended to continue driving with code P142C GMC present, as unresolved issues related to the Particulate Matter Sensor Control Module Temperature Sensor 1 may lead to further complications and potential engine damage.
7. How can I repair OBDII code P142C GMC?
Repairing code P142C GMC may involve replacing the faulty Particulate Matter Sensor Control Module Temperature Sensor 1, repairing any damaged wiring, or addressing issues with the control module as needed.
8. Can I clear OBDII code P142C GMC without fixing the underlying issue?
While you can clear the code temporarily, it is crucial to address the root cause of code P142C GMC to prevent recurring check engine light activation and potential long-term damage.
9. Are there any DIY tips for troubleshooting OBDII code P142C GMC?
If you're comfortable working on your vehicle, you can start troubleshooting code P142C GMC by inspecting the sensor connections, checking for wiring damage, and testing the sensor's voltage output with a multimeter.
10. How much does it cost to fix OBDII code P142C GMC at a repair shop?
The cost of fixing code P142C GMC can vary depending on the extent of the issue, the need for parts replacement, and labor costs. It's recommended to consult with a trusted mechanic for an accurate estimate.
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