Engine-Codes.com
Engine-Codes – Generic – P142E

P142E Code - Exhaust Gas Recirculation Sensor 'D' Circuit High

Quick Answer

The P142E diagnostic trouble code indicates that there is a problem with the Exhaust Gas Recirculation (EGR) sensor 'D' circuit, specifically that the circuit is reading a high voltage. Common causes include Faulty EGR Sensor: The EGR sensor 'D' itself may be malfunctioning, leading to the high voltage reading in the circuit, Wiring Issues: Damaged or corroded wiring connecting the EGR sensor 'D' to the vehicle's ECM (Engine Control Module) can cause circuit high faults, ECM Malfunction: A faulty ECM can also trigger this code by sending incorrect signals or not properly interpreting data from the EGR sensor 'D'. 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 indicates Exhaust Gas Recirculation Sensor 'D' Circuit High.
Common causes
Common causes include Faulty EGR Sensor: The EGR sensor 'D' itself may be malfunctioning, leading to the high voltage reading in the circuit, Wiring Issues: Damaged or corroded wiring connecting the EGR sensor 'D' to the vehicle's ECM (Engine Control Module) can cause circuit high faults, ECM Malfunction: A faulty ECM can also trigger this code by sending incorrect signals or not properly interpreting data from the EGR sensor 'D'.
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 Aug 19, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P142E Description

The P142E diagnostic trouble code indicates that there is a problem with the Exhaust Gas Recirculation (EGR) sensor 'D' circuit, specifically that the circuit is reading a high voltage. The EGR system is responsible for reducing emissions by recirculating a portion of the exhaust gases back into the intake manifold. The EGR sensor 'D' is a crucial component that monitors the flow and operation of the EGR system. When the sensor detects a high voltage in the circuit, it signifies a fault that could affect the vehicle's performance and emissions output. This issue may cause the vehicle to run rough, decrease fuel efficiency, and potentially lead to increased emissions.

OBDII Code P142E - Exhaust Gas Recirculation Sensor 'D' Circuit High
P142E Code - Exhaust Gas Recirculation Sensor 'D' Circuit High

Common Causes of P142E

  1. Faulty EGR Sensor: The EGR sensor 'D' itself may be malfunctioning, leading to the high voltage reading in the circuit.
  2. Wiring Issues: Damaged or corroded wiring connecting the EGR sensor 'D' to the vehicle's ECM (Engine Control Module) can cause circuit high faults.
  3. ECM Malfunction: A faulty ECM can also trigger this code by sending incorrect signals or not properly interpreting data from the EGR sensor 'D'.
  4. Carbon Buildup: Excessive carbon buildup in the EGR system can obstruct the sensor's operation and cause circuit high readings.

Symptoms of P142E

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
  2. Rough Idle: The vehicle may experience a rough or unstable idle when the EGR sensor 'D' circuit is malfunctioning.
  3. Decreased Fuel Efficiency: A faulty EGR sensor 'D' circuit can lead to decreased fuel efficiency as the engine may not be operating optimally.
  4. Emissions Issues: The vehicle may fail emissions tests or emit higher levels of pollutants if the EGR system is not functioning properly.

How to Fix P142E

  1. Diagnose the Issue: Use an OBD-II scanner to retrieve the specific trouble code and determine if the EGR sensor 'D' circuit is indeed the problem.
  2. Inspect Wiring: Check the wiring harness for any signs of damage, corrosion, or loose connections and repair or replace as necessary.
  3. Test EGR Sensor: Test the EGR sensor 'D' to verify if it is functioning correctly and replace it if found to be faulty.
  4. Clean EGR System: Remove any carbon buildup in the EGR system components to ensure proper operation and prevent future issues.
  5. Clear Codes: After completing the repairs, clear the diagnostic trouble codes and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P142E

The cost of repairing a P142E code can vary depending on the specific cause of the issue and the labor rates in your area. On average, the repair for this code can range from $150 to $500, including parts and labor. It's important to note that additional diagnostic time may be needed to pinpoint the exact cause of the problem, which can affect the overall cost. It's recommended to consult with a qualified mechanic or auto repair shop for an accurate estimate based on your vehicle's make and model.

Need more information about the P142E code?

Need more information on how to fix the P142E code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P142E code diagnosed by a professional: Find a repair shop in your area

Code P142E Information for Specific Makes

  • P142E Buick — Particulate Matter Sensor Control Module Temperature Sensor 2 Low Voltage
  • P142E Cadillac — Particulate Matter Sensor Control Module Temperature Sensor 2 Low Voltage
  • P142E Chevrolet — Particulate Matter Sensor Control Module Temperature Sensor 2 Low Voltage
  • P142E Ford — Exhaust Gas Recirculation Sensor 'D' Circuit High
  • P142E GMC — Particulate Matter Sensor Control Module Temperature Sensor 2 Low Voltage
  • P142E Lincoln — Exhaust Gas Recirculation Sensor 'D' Circuit High
  • P142E Mercury — Exhaust Gas Recirculation Sensor 'D' Circuit High
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 Code

1. What are the common symptoms of OBDII code P142E (Exhaust Gas Recirculation Sensor 'D' Circuit High)?

The common symptoms include rough idling, reduced engine performance, increased fuel consumption, and the illumination of the Check Engine Light.

2. What are some possible causes of OBDII code P142E?

Possible causes of this code include a faulty EGR sensor, damaged wiring or connectors in the EGR sensor circuit, a malfunctioning EGR valve, or issues with the engine control module.

3. How can I diagnose OBDII code P142E?

Diagnosing this code involves using an OBDII scanner to retrieve the code and then performing a visual inspection of the EGR sensor, checking the wiring and connectors for damage, and testing the functionality of the EGR valve.

4. Can I still drive my vehicle with OBDII code P142E present?

It is not recommended to drive your vehicle with this code present, as it can lead to further damage to the engine and reduce fuel efficiency. It's best to address the issue promptly.

5. How can I repair OBDII code P142E?

Repairing this code may involve replacing the faulty EGR sensor, repairing or replacing damaged wiring or connectors, cleaning or replacing the EGR valve, or reprogramming the engine control module.

6. Are there any DIY tips for fixing OBDII code P142E?

While some basic diagnostic steps can be performed by DIY enthusiasts, it is recommended to seek professional help for repairing this code, as it may involve complex electrical and mechanical work.

7. What happens if OBDII code P142E is ignored?

Ignoring this code can lead to poor engine performance, increased emissions, and potential damage to other engine components over time. It's important to address the issue promptly.

8. How long does it typically take to repair OBDII code P142E?

The repair time for this code can vary depending on the exact cause of the issue and the extent of the repairs needed. It can range from a few hours to a full day in some cases.

9. Can a faulty EGR sensor cause other OBDII codes to appear?

Yes, a faulty EGR sensor can cause other related codes to appear, such as codes related to EGR flow, EGR circuit low, or EGR system performance issues. It's important to address all related codes during diagnosis and repair.

10. Is it necessary to reset the Check Engine Light after repairing OBDII code P142E?

Yes, it is recommended to reset the Check Engine Light using an OBDII scanner after repairing the issue to ensure that the system recognizes the repairs and to monitor for any new issues that may arise.

Discuss the causes and fixes for P142E OBDII Code

Submit a New Comment

Code P142E comments

No comments found for this page.