AutoCodes – Mercury – P140F Mercury

P140F Mercury Code - EGR Throttle Stuck

Quick Answer

The Powertrain Control Module (PCM) monitors the Exhaust Gas Recirculation (EGR) Valve. Common causes include Faulty Exhaust Gas Recirculation Valve, Exhaust Gas Recirculation Valve harness is open or shorted, Exhaust Gas Recirculation Valve 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: P140F Mercury indicates EGR Throttle Stuck.
Common causes: Common causes include Faulty Exhaust Gas Recirculation Valve, Exhaust Gas Recirculation Valve harness is open or shorted, Exhaust Gas Recirculation Valve 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 1,012

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 P140F Mercury Description

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

OBDII Code P140F Mercury - EGR Throttle Stuck - AutoCodes.com — P140F Mercury Code - EGR Throttle Stuck

What does this mean?

What are the Possible Causes of the DTC P140F Mercury?

Faulty Exhaust Gas Recirculation Valve
Exhaust Gas Recirculation Valve harness is open or shorted
Exhaust Gas Recirculation Valve circuit poor electrical connection

How to Fix the DTC P140F 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 P140F 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.

Need more information about the P140F Mercury code?

Need more information on how to fix the P140F Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P140F Mercury code diagnosed by a professional: Find a repair shop in your area

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 P140F Mercury Code

1. What are the common symptoms of OBDII code P140F in a Mercury related to EGR throttle stuck?

The common symptoms include rough idling, poor engine performance, decreased fuel efficiency, and potentially a Check Engine light illuminated on the dashboard.

2. What are some possible causes of the OBDII code P140F in a Mercury indicating EGR throttle stuck?

The code P140F can be triggered by a faulty EGR valve, carbon buildup in the EGR system, electrical issues, or a malfunctioning EGR throttle position sensor.

3. How can I diagnose the OBDII code P140F in my Mercury that points to an EGR throttle stuck issue?

A thorough diagnosis typically involves checking the EGR valve operation, inspecting for carbon deposits in the EGR system, testing the EGR throttle position sensor, and scanning for associated trouble codes.

4. Is it safe to continue driving my Mercury with the OBDII code P140F related to EGR throttle stuck?

It is generally not recommended to drive the vehicle extensively with this code, as it can lead to further damage to the engine and emissions system over time.

5. What are some repair tips for addressing the OBDII code P140F in a Mercury due to EGR throttle stuck?

Repair options may include cleaning or replacing the EGR valve, clearing carbon buildup in the EGR system, checking and replacing the EGR throttle position sensor, and ensuring proper electrical connections.

6. Can I reset the OBDII code P140F in my Mercury myself after repairing the EGR throttle stuck issue?

Yes, the code can typically be cleared using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to reset the system.

7. How much can I expect to pay for repairing the OBDII code P140F in my Mercury caused by EGR throttle stuck?

The cost of repair can vary depending on the exact cause of the issue, but it may range from a few hundred to a few thousand dollars, including parts and labor.

8. Will fixing the OBDII code P140F related to EGR throttle stuck improve my Mercury's overall performance and fuel efficiency?

Yes, addressing the issue should help restore proper engine performance, improve fuel efficiency, and prevent potential further damage to the vehicle's systems.

9. Are there any preventive maintenance measures I can take to avoid the OBDII code P140F in my Mercury due to EGR throttle stuck in the future?

Regularly servicing and cleaning the EGR system, using high-quality fuel, and following the manufacturer's recommended maintenance schedule can help prevent EGR-related issues.