AutoCodes – Mercury – P142E Mercury

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

Quick Answer

The Powertrain Control Module (PCM) monitors the Exhaust Gas Recirculation Sensor 'D'. Common causes include Faulty Exhaust Gas Recirculation Sensor 'D', Exhaust Gas Recirculation Sensor 'D' harness is open or shorted, Exhaust Gas Recirculation Sensor 'D' 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: P142E Mercury indicates Exhaust Gas Recirculation Sensor 'D' Circuit High.
Common causes: Common causes include Faulty Exhaust Gas Recirculation Sensor 'D', Exhaust Gas Recirculation Sensor 'D' harness is open or shorted, Exhaust Gas Recirculation Sensor 'D' 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.

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Code Popularity 1,086

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 24, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P142E Mercury Description

The Powertrain Control Module (PCM) monitors the Exhaust Gas Recirculation Sensor 'D'. The PCM sets the OBDII code when the Exhaust Gas Recirculation Sensor 'D' is not to factory specifications.

OBDII Code P142E Mercury - Exhaust Gas Recirculation Sensor 'D' Circuit High - AutoCodes.com — P142E Mercury Code - Exhaust Gas Recirculation Sensor 'D' Circuit High

What does this mean?

What are the Possible Causes of the DTC P142E Mercury?

Faulty Exhaust Gas Recirculation Sensor 'D'
Exhaust Gas Recirculation Sensor 'D' harness is open or shorted
Exhaust Gas Recirculation Sensor 'D' circuit poor electrical connection

How to Fix the DTC P142E Mercury?

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

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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 Mercury Code

1. What does the OBDII code P142E mean for a Mercury vehicle?

P142E indicates that the Exhaust Gas Recirculation (EGR) Sensor 'D' Circuit is experiencing a high voltage issue, which may affect the EGR system's performance.

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

Symptoms may include the check engine light turning on, rough idling, reduced engine performance, increased emissions, and possible engine hesitation during acceleration.

3. What causes the P142E code to occur in a Mercury vehicle?

Common causes include a faulty EGR sensor, damaged or corroded wiring in the EGR circuit, a malfunctioning EGR valve, or a problem with the vehicle's powertrain control module (PCM).

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

While it may be possible to drive with this code, it is not recommended as it could lead to reduced fuel efficiency, higher emissions, and potential damage to the EGR system or engine.

5. How can I diagnose the P142E code on my Mercury?

Start by using an OBDII scanner to confirm the code. Then, inspect the EGR sensor, wiring, and connectors for damage or corrosion. Test the EGR sensor and valve with a multimeter to check for proper operation.

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

Repairs may include replacing the faulty EGR sensor, repairing or replacing damaged wiring or connectors, cleaning the EGR valve, or in rare cases, reprogramming or replacing the PCM.

7. How much does it cost to fix the P142E code on a Mercury vehicle?

The repair cost depends on the issue. EGR sensor replacement typically costs $150-$300, while wiring repairs or EGR valve cleaning may cost less. PCM replacement is more expensive, ranging from $500-$1,500.

8. Can a clogged EGR valve trigger the P142E code?

Yes, a clogged or malfunctioning EGR valve can lead to abnormal sensor readings and potentially trigger the P142E code.

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

Regular maintenance, including cleaning the EGR valve and inspecting wiring and connectors for corrosion, can help prevent this code from reoccurring.

10. Will clearing the P142E code with an OBDII scanner fix the issue?

Clearing the code may temporarily remove the check engine light, but the underlying issue must be addressed to prevent the code from returning.