P142B Chevrolet 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 Chevrolet 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 Chevrolet 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 Chevrolet?
- 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 Chevrolet?
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 Chevrolet 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 Chevrolet Code
1. What are the common symptoms of OBDII code P142B in a Chevrolet related to the Particulate Matter Sensor Control Module High Temperature?
- Common symptoms may include the check engine light illuminating, reduced engine performance, and potential issues with the exhaust system.
2. What are the possible causes of OBDII code P142B in a Chevrolet indicating a Particulate Matter Sensor Control Module High Temperature fault?
- Possible causes can include a faulty particulate matter sensor, issues with the control module, exhaust leaks, or sensor wiring problems.
3. How can I diagnose OBDII code P142B in my Chevrolet related to the Particulate Matter Sensor Control Module High Temperature?
- Diagnosis typically involves using an OBDII scanner to retrieve the specific fault code, checking the sensor and module for proper operation, and inspecting the exhaust system for leaks.
4. Are there any quick repair tips for addressing OBDII code P142B in a Chevrolet due to Particulate Matter Sensor Control Module High Temperature issues?
- Quick repair tips may include checking and cleaning sensor connections, ensuring proper sensor operation, and addressing any exhaust leaks or wiring issues.
5. Is it safe to continue driving my Chevrolet with OBDII code P142B related to the Particulate Matter Sensor Control Module High Temperature fault?
- It is generally not recommended to continue driving with this fault as it can lead to reduced engine performance and potential damage to the exhaust system.
6. Can I reset the OBDII code P142B in my Chevrolet indicating a Particulate Matter Sensor Control Module High Temperature fault on my own?
- While you can clear the code with an OBDII scanner, it is important to address the underlying issue causing the fault to prevent it from recurring.
7. How much does it typically cost to repair OBDII code P142B in a Chevrolet related to the Particulate Matter Sensor Control Module High Temperature?
- The cost of repair can vary depending on the specific issue, but it may involve sensor or module replacement, which could range from $200 to $500 or more.
8. Are there any recalls or technical service bulletins related to OBDII code P142B in Chevrolet vehicles with Particulate Matter Sensor Control Module High Temperature faults?
- It's recommended to check with a Chevrolet dealership or online resources for any recalls or technical service bulletins specific to this issue in your vehicle.
9. How often should I have the particulate matter sensor and control module inspected in my Chevrolet to prevent OBDII code P142B from occurring?
- It's a good practice to have these components inspected during routine maintenance visits or if you notice any symptoms indicating a potential issue.
10. Can a malfunctioning Particulate Matter Sensor Control Module High Temperature affect the vehicle's emissions and overall environmental impact?
- Yes, a malfunctioning sensor or control module can impact emissions, potentially leading to increased pollution and environmental harm.
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