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Engine-Codes – Generic – P142F

P142F Code - Exhaust Gas Recirculation Sensor 'D' Circuit Intermittent/Erratic

Quick Answer

The P142F diagnostic trouble code (DTC) refers to a problem with the Exhaust Gas Recirculation (EGR) sensor 'D' circuit, indicating an intermittent or erratic signal. Common causes include Faulty EGR sensor 'D', Wiring or connector issues in the EGR sensor circuit, Malfunctioning EGR valve. 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
P142F indicates Exhaust Gas Recirculation Sensor 'D' Circuit Intermittent/Erratic.
Common causes
Common causes include Faulty EGR sensor 'D', Wiring or connector issues in the EGR sensor circuit, Malfunctioning EGR valve.
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 P142F Description

The P142F diagnostic trouble code (DTC) refers to a problem with the Exhaust Gas Recirculation (EGR) sensor 'D' circuit, indicating an intermittent or erratic signal. The EGR system is responsible for recirculating a portion of exhaust gases back into the engine intake to reduce emissions and improve fuel efficiency. The EGR sensor 'D' plays a crucial role in monitoring the EGR system's operation and ensuring that the correct amount of exhaust gases is being recirculated.

OBDII Code P142F - Exhaust Gas Recirculation Sensor 'D' Circuit Intermittent/Erratic
P142F Code - Exhaust Gas Recirculation Sensor 'D' Circuit Intermittent/Erratic

Common Causes of P142F

  1. Faulty EGR sensor 'D'
  2. Wiring or connector issues in the EGR sensor circuit
  3. Malfunctioning EGR valve
  4. Carbon buildup in the EGR system
  5. Engine control module (ECM) software issues

Symptoms of P142F

  1. Rough idling or engine hesitation
  2. Stalling or poor acceleration
  3. Check Engine Light illuminated
  4. Failed emissions tests
  5. Reduced fuel efficiency

How to Fix P142F

  1. Use a diagnostic scanner to retrieve the specific DTC and verify the EGR sensor 'D' circuit issue.
  2. Inspect the EGR sensor 'D', wiring, and connectors for any damage or corrosion. Replace or repair as needed.
  3. Check the EGR valve for proper operation and clean or replace if necessary.
  4. Clear the DTC and reset the ECM to see if the issue recurs.
  5. Test drive the vehicle to ensure the problem has been resolved and the Check Engine Light does not reappear.

Cost to Fix P142F

The typical repair costs for addressing a P142F DTC related to the EGR sensor 'D' circuit can range from $150 to $500, depending on the extent of the issue and the parts and labor required. This estimate includes the cost of diagnostic services, replacement parts, and labor. However, it's important to note that actual repair costs can vary based on factors such as location, vehicle make and model, and the specific repair shop's labor rates. It's advisable to consult with a trusted mechanic or auto repair shop to obtain a more accurate estimate for resolving this particular issue.

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Code P142F Information for Specific Makes

  • P142F Buick — Particulate Matter Sensor Control Module Temperature Sensor 2 High Voltage
  • P142F Cadillac — Particulate Matter Sensor Control Module Temperature Sensor 2 High Voltage
  • P142F Chevrolet — Particulate Matter Sensor Control Module Temperature Sensor 2 High Voltage
  • P142F Ford — Exhaust Gas Recirculation Sensor 'D' Circuit Intermittent/Erratic
  • P142F GMC — Particulate Matter Sensor Control Module Temperature Sensor 2 High Voltage
  • P142F Lincoln — Exhaust Gas Recirculation Sensor 'D' Circuit Intermittent/Erratic
  • P142F Mercury — Exhaust Gas Recirculation Sensor 'D' Circuit Intermittent/Erratic
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 P142F Code

1. What are the common symptoms of OBDII code P142F related to the Exhaust Gas Recirculation Sensor 'D' Circuit Intermittent/Erratic?

- Common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and potential stalling.

2. What are the possible causes of OBDII code P142F indicating an issue with the EGR Sensor 'D' Circuit?

- Possible causes can include a faulty EGR sensor, damaged wiring or connectors, EGR system blockages, or issues with the engine control module.

3. How can I diagnose the Exhaust Gas Recirculation Sensor 'D' Circuit Intermittent/Erratic issue triggering code P142F?

- To diagnose the problem, you can use an OBDII scanner to read the code and check for any related freeze frame data. Additionally, inspect the EGR sensor, wiring, and connections for any visible damage.

4. Can a dirty EGR system lead to the intermittent/erratic operation of the EGR Sensor 'D' causing code P142F?

- Yes, a dirty EGR system can restrict the flow of exhaust gases, affecting the sensor's operation and triggering the P142F code. Regular maintenance of the EGR system is crucial.

5. What are some repair tips for resolving OBDII code P142F associated with the Exhaust Gas Recirculation Sensor 'D' Circuit Intermittent/Erratic issue?

- Repair tips may include cleaning or replacing the EGR sensor, checking and repairing any damaged wiring or connectors, ensuring proper EGR system functionality, and resetting the error code.

6. Are there any safety concerns associated with driving a vehicle with an unresolved P142F code related to the EGR Sensor 'D' Circuit?

- Continuing to drive with this issue may lead to further damage to the engine or emissions system, potentially causing more severe problems over time. It is advisable to address the problem promptly.

7. Will disconnecting the EGR system temporarily resolve the P142F code related to the EGR Sensor 'D' Circuit?

- Disconnecting the EGR system is not a recommended solution, as it can lead to increased emissions, reduced fuel efficiency, and potential engine damage. It is best to diagnose and repair the root cause of the issue.

8. How crucial is it to address the OBDII code P142F signifying a problem with the Exhaust Gas Recirculation Sensor 'D' Circuit?

- It is important to address this code promptly to ensure proper engine performance, fuel efficiency, and emissions compliance. Ignoring the issue can lead to more significant problems down the line.

9. Can a DIY enthusiast with basic automotive knowledge repair the P142F code related to the EGR Sensor 'D' Circuit issue?

- Depending on the exact cause of the problem, some DIY enthusiasts may be able to address the issue by inspecting and potentially cleaning or replacing the EGR sensor or related components. However, complex issues may require professional assistance.

10. How can regular maintenance help prevent the occurrence of OBDII code P142F linked to the Exhaust Gas Recirculation Sensor 'D' Circuit?

- Regular maintenance, such as cleaning the EGR system components, inspecting wiring and connectors, and monitoring engine performance, can help prevent issues leading to the P142F code and ensure smooth operation of the EGR system.

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