P142B GMC Code - Particulate Matter Sensor Control Module High Temperature
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
- P142B GMC indicates Particulate Matter Sensor Control Module High Temperature.
- 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 P142B 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 P142B 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 P142B 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 P142B 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 P142B GMC Code
1. What are common symptoms of the P142B GMC OBDII code?
- Common symptoms include the check engine light illuminating, reduced engine performance, and potential fuel efficiency issues.
2. What does the P142B GMC code indicate?
- The code indicates a problem with the Particulate Matter Sensor Control Module experiencing high temperature.
3. What are possible causes of the P142B GMC code?
- Possible causes include a faulty particulate matter sensor, a malfunctioning control module, wiring issues, or exhaust system problems.
4. How can I diagnose the P142B GMC code?
- Diagnosing the code typically involves using an OBDII scanner to retrieve the specific fault code and then conducting further testing to identify the root cause.
5. Can I still drive my vehicle with the P142B GMC code?
- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage and potential safety hazards.
6. How can I repair the P142B GMC code?
- Repair options may involve replacing the particulate matter sensor, repairing or replacing the control module, addressing any wiring issues, or repairing the exhaust system.
7. Will resetting the check engine light fix the P142B GMC code?
- Simply resetting the check engine light will not fix the underlying issue causing the P142B code. It is important to diagnose and address the root cause of the problem.
8. Is the P142B GMC code a common issue in GMC vehicles?
- While not as common as some other OBDII codes, the P142B code can still occur in GMC vehicles, particularly in those equipped with particulate matter sensors.
9. Can a DIY enthusiast repair the P142B GMC code?
- Depending on their skill level and access to tools, a DIY enthusiast may be able to address the P142B code by following repair guides and procedures, but professional assistance is recommended for complex issues.
10. How can I prevent the P142B GMC code from recurring?
- Regular maintenance, timely repairs of related components, and avoiding harsh driving conditions can help prevent the recurrence of the P142B GMC OBDII code.
Discuss the causes and fixes for P142B GMC OBDII Code
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