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P142E Buick Code - Particulate Matter Sensor Control Module Temperature Sensor 2 Low Voltage

Quick Answer

The P142E Buick diagnostic trouble code (DTC) indicates a problem with the Particulate Matter Sensor Control Module Temperature Sensor 2, specifically low voltage. Common causes include Faulty Temperature Sensor: The temperature sensor itself may be malfunctioning, leading to low voltage readings, Wiring Issues: Corrosion, damage, or poor connections in the wiring harness between the sensor and the control module can cause low voltage readings, Control Module Malfunction: A malfunction in the particulate matter sensor control module can also trigger this code. 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 Buick indicates Particulate Matter Sensor Control Module Temperature Sensor 2 Low Voltage.
Common causes
Common causes include Faulty Temperature Sensor: The temperature sensor itself may be malfunctioning, leading to low voltage readings, Wiring Issues: Corrosion, damage, or poor connections in the wiring harness between the sensor and the control module can cause low voltage readings, Control Module Malfunction: A malfunction in the particulate matter sensor control module can also trigger this code.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P142E Buick Description

The P142E Buick diagnostic trouble code (DTC) indicates a problem with the Particulate Matter Sensor Control Module Temperature Sensor 2, specifically low voltage. In modern vehicles, particulate matter sensors are crucial for monitoring and controlling the emissions produced by the vehicle's exhaust system. These sensors help ensure that the vehicle meets emission standards and functions efficiently.

OBDII Code P142E Buick - Particulate Matter Sensor Control Module Temperature Sensor 2 Low Voltage
P142E Buick Code - Particulate Matter Sensor Control Module Temperature Sensor 2 Low Voltage

Common Causes of P142E Buick

  1. Faulty Temperature Sensor: The temperature sensor itself may be malfunctioning, leading to low voltage readings.
  2. Wiring Issues: Corrosion, damage, or poor connections in the wiring harness between the sensor and the control module can cause low voltage readings.
  3. Control Module Malfunction: A malfunction in the particulate matter sensor control module can also trigger this code.
  4. Electrical Problems: General electrical issues within the vehicle's system, such as a short circuit or blown fuse, can impact sensor performance.
  5. Environmental Factors: Exposure to extreme temperatures or contaminants can affect the sensor's functionality over time.

Symptoms of P142E Buick

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the vehicle's dashboard.
  2. Reduced Fuel Efficiency: A decrease in fuel efficiency may be observed as a result of the engine running less efficiently due to inaccurate sensor readings.
  3. Emission Smell: An unusual smell coming from the exhaust may indicate that the particulate matter levels are not being properly monitored.
  4. Engine Misfires: In severe cases, engine misfires or rough idling may occur due to incorrect sensor readings affecting engine performance.

How to Fix P142E Buick

  1. Diagnose the Issue: Use a diagnostic scan tool to retrieve the specific DTC and further investigate the cause of the low voltage readings.
  2. Inspect Sensor and Wiring: Check the condition of the temperature sensor 2 and inspect the wiring for any signs of damage, corrosion, or loose connections.
  3. Test Control Module: Test the functionality of the particulate matter sensor control module to determine if it is functioning properly.
  4. Replace Faulty Components: Replace the temperature sensor 2, repair or replace any damaged wiring, or replace the control module as needed to resolve the issue.
  5. Clear Codes and Test: After completing the repairs, clear the DTCs from the vehicle's computer and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P142E Buick

The cost of repairing a P142E Buick code can vary depending on the specific cause of the issue and the vehicle's make and model. On average, the parts required for this repair, such as a new temperature sensor, wiring harness, or control module, can range from $100 to $500. Labor costs for this repair can add an additional $100 to $300, depending on the shop's hourly rates and the complexity of the repair.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P142E Buick Code

1. What does the OBDII code P142E mean on a Buick?

P142E indicates that the Particulate Matter Sensor Control Module has detected a low voltage signal from Temperature Sensor 2, which is used to monitor the exhaust system's performance.

2. What are the common symptoms of the P142E code?

Symptoms may include an illuminated check engine light, reduced fuel efficiency, increased emissions, or potential loss of engine power in severe cases.

3. What causes the P142E code to appear?

Common causes include a faulty particulate matter sensor, damaged wiring or connectors, a malfunctioning temperature sensor, or issues within the exhaust system.

4. Can I drive my Buick with the P142E code?

While your car may still be drivable, ignoring this code could lead to reduced performance, higher emissions, and potential damage to other exhaust components.

5. How can I diagnose the P142E code?

Start by using an OBDII scanner to confirm the code, then visually inspect the wiring and connectors around the particulate matter sensor and its temperature sensors for damage or corrosion.

6. What repairs are needed to fix the P142E code?

Repairs might include replacing the temperature sensor, repairing or replacing damaged wiring, cleaning or replacing the particulate matter sensor, or updating the control module's software.

7. How much does it cost to fix a P142E code on a Buick?

The cost can vary, but replacing a temperature sensor typically ranges from $200 to $400, including parts and labor. Wiring repairs might cost less, depending on the extent of the damage.

8. Can a software update fix the P142E code?

In some cases, a software update for the engine control module or particulate matter sensor control module may resolve the issue if it’s related to incorrect calibration or programming.

9. How can I prevent the P142E code from returning?

Regular maintenance of your exhaust system, including inspecting sensors and wiring, can help prevent this code. Using high-quality fuel and keeping the particulate filter clean may also reduce the likelihood of recurrence.

10. Is the P142E code specific to Buicks?

No, the P142E code can appear on other vehicles as well, but the exact diagnostic and repair process may vary depending on the make and model. Always refer to your vehicle's service manual for guidance.

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