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Engine-Codes – Generic – P142B

P142B Code - Exhaust Gas Recirculation Sensor 'D' Circuit

Quick Answer

The P142B code specifically refers to an issue with the Exhaust Gas Recirculation (EGR) sensor 'D' circuit. Common causes include Faulty EGR sensor 'D', Wiring harness issues, 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
P142B indicates Exhaust Gas Recirculation Sensor 'D' Circuit.
Common causes
Common causes include Faulty EGR sensor 'D', Wiring harness issues, 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 P142B Description

The P142B code specifically refers to an issue with the Exhaust Gas Recirculation (EGR) sensor 'D' circuit. The EGR system is responsible for reducing emissions by recirculating a portion of the engine's exhaust gas back into the intake manifold, where it is re-burned to reduce harmful nitrogen oxide emissions. The EGR sensor 'D' is a crucial component that monitors the EGR system's operation and ensures that the proper amount of exhaust gas is being recirculated.

OBDII Code P142B - Exhaust Gas Recirculation Sensor 'D' Circuit
P142B Code - Exhaust Gas Recirculation Sensor 'D' Circuit

Common Causes of P142B

  1. Faulty EGR sensor 'D'
  2. Wiring harness issues
  3. Malfunctioning EGR valve
  4. Problem with the engine control module (ECM)
  5. Clogged EGR passages

Symptoms of P142B

  1. Decreased fuel efficiency
  2. Rough idling or engine misfires
  3. Hesitation during acceleration
  4. Increased emissions
  5. Stalling

How to Fix P142B

  1. Use a diagnostic scanner to retrieve the trouble code and pinpoint the exact cause of the issue.
  2. Inspect the wiring harness for any damage or loose connections and repair as necessary.
  3. Test the EGR sensor 'D' and replace it if it is faulty.
  4. Check the EGR valve and clean or replace it if needed.
  5. Clear the trouble code from the ECM's memory and perform a test drive to ensure that the issue has been resolved.

Cost to Fix P142B

The typical repair costs for addressing the P142B code can vary depending on the exact cause of the issue and the specific components that need to be replaced. In general, the cost of replacing the EGR sensor 'D' can range from $100 to $300, while replacing the EGR valve can cost between $200 and $500. Labor costs can add an additional $100 to $300 to the total repair bill. It's important to note that these estimates are rough averages and actual repair costs may vary based on the location, make and model of the vehicle, and the rates charged by the auto repair shop. It's advisable to consult with a trusted mechanic to get a more accurate estimate for addressing the P142B code.

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Code P142B Information for Specific Makes

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 P142B Code

1. What are common symptoms of OBDII code P142B related to the Exhaust Gas Recirculation (EGR) Sensor 'D' circuit?

The common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and the illumination of the check engine light.

2. What are some possible causes of OBDII code P142B?

Possible causes of this code include a faulty EGR sensor 'D', damaged wiring or connectors in the EGR circuit, a clogged EGR valve, or issues with the EGR system's operation.

3. How can I diagnose the source of OBDII code P142B?

To diagnose the source of this code, it is recommended to perform a thorough inspection of the EGR sensor 'D', check for any visible damage to wiring or connectors, test the EGR valve's functionality, and use an OBDII scanner to retrieve specific diagnostic trouble codes.

4. What are some repair tips for addressing OBDII code P142B?

Repair tips for this code may include replacing the EGR sensor 'D' if found faulty, repairing or replacing damaged wiring or connectors, cleaning or replacing a clogged EGR valve, and ensuring proper operation of the entire EGR system.

5. Is it safe to continue driving with OBDII code P142B present?

It is not recommended to continue driving with this code present, as it can lead to further engine damage and decreased performance. It is best to address the underlying issue as soon as possible.

6. Can OBDII code P142B be reset without fixing the underlying issue?

While the code can be cleared using an OBDII scanner, it is important to address the root cause of the issue to prevent it from recurring and potentially causing more severe problems in the future.

7. How much does it typically cost to repair OBDII code P142B?

The cost of repairing this code can vary depending on the specific issue causing it, the cost of parts needed for repair, and labor charges. It is recommended to consult with a professional mechanic for an accurate estimate.

8. Are there any preventive measures to avoid OBDII code P142B from occurring?

Regular maintenance of the EGR system, including cleaning the EGR valve and inspecting the sensor 'D' and wiring, can help prevent issues that lead to this code. Additionally, using high-quality fuel and following recommended maintenance schedules can aid in preventing OBDII codes from appearing.

9. Can a DIY enthusiast with basic automotive knowledge repair OBDII code P142B?

Depending on the specific issue causing the code, a DIY enthusiast with basic automotive knowledge may be able to address some aspects of the repair, such as checking and cleaning the EGR valve or inspecting wiring. However, complex issues may require professional assistance.

10. How long does it typically take to repair OBDII code P142B?

The repair time for this code can vary based on the complexity of the issue and the extent of the necessary repairs. Some repairs may be completed in a few hours, while more involved repairs could take longer. It is advisable to consult with a mechanic for a more accurate timeframe.

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