AutoCodes – Mercury – P025A Mercury

P025A Mercury Code - Fuel Pump Module Control Circuit/Open

Quick Answer

The Powertrain Control Module (PCM) monitors the Fuel Pump Command (FPC) circuit for a concern. Common causes include Faulty Fuel Pump Command (FPC), FPC Harness is open or shorted, FPC 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: P025A Mercury indicates Fuel Pump Module Control Circuit/Open.
Common causes: Common causes include Faulty Fuel Pump Command (FPC), FPC Harness is open or shorted, FPC 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 1,765

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 May 17, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P025A Mercury Description

The Powertrain Control Module (PCM) monitors the Fuel Pump Command (FPC) circuit for a concern. When the PCM commands the Fuel Pump (FP) ON, the PCM is able to detect a short to voltage on the FPC circuit. When the PCM commands the FP OFF, the PCM is able to detect an open circuit or a short to ground on the FPC circuit. The test fails if the voltage is less than or greater than a calibrated limit, for a calibrated amount of time.

OBDII Code P025A Mercury - Fuel Pump Module Control Circuit/Open - AutoCodes.com — P025A Mercury Code - Fuel Pump Module Control Circuit/Open

What does this mean?

What are the Possible Causes of the DTC P025A Mercury?

Faulty Fuel Pump Command (FPC)
FPC Harness is open or shorted
FPC circuit poor electrical connection

How to Fix the DTC P025A 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 P025A 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 P025A Mercury code?

Need more information on how to fix the P025A 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 P025A Mercury Code

1. What are the common symptoms of OBDII code P025A in a Mercury related to the Fuel Pump Module Control Circuit/Open?

- Common symptoms include difficulty starting the vehicle, loss of power while driving, engine stalling, and the fuel pump not functioning properly.

2. What are the potential causes of OBDII code P025A in a Mercury related to the Fuel Pump Module Control Circuit/Open?

- The code P025A can be triggered by issues such as a faulty fuel pump module, damaged wiring or connectors in the fuel pump circuit, or a problem with the fuel pump relay.

3. How can I diagnose OBDII code P025A in my Mercury related to the Fuel Pump Module Control Circuit/Open?

- To diagnose this code, you can use a scan tool to read the code and check for any other related codes. You can also inspect the wiring and connectors in the fuel pump circuit for any visible damage.

4. Can I still drive my Mercury with OBDII code P025A related to the Fuel Pump Module Control Circuit/Open?

- It is not recommended to drive your Mercury with this code present, as it can lead to issues such as engine stalling or fuel pump failure, which can be dangerous while driving.

5. How do I repair OBDII code P025A in my Mercury related to the Fuel Pump Module Control Circuit/Open?

- Repairing this code may involve replacing the fuel pump module, repairing or replacing damaged wiring or connectors, or checking and replacing the fuel pump relay if necessary.

6. Can a DIY enthusiast fix OBDII code P025A related to the Fuel Pump Module Control Circuit/Open in a Mercury?

- While some basic diagnosis and repair steps can be done by a knowledgeable DIY enthusiast, dealing with fuel system components like the fuel pump module may require professional expertise.

7. How much does it cost to repair OBDII code P025A in a Mercury related to the Fuel Pump Module Control Circuit/Open?

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

8. Will resetting the OBDII code P025A related to the Fuel Pump Module Control Circuit/Open make it go away permanently?

- Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing the code is not fixed, the code is likely to reappear after driving the vehicle for a while.

9. Are there any preventive measures to avoid encountering OBDII code P025A related to the Fuel Pump Module Control Circuit/Open in a Mercury?

- Regular maintenance and inspections of the fuel system components, such as the fuel pump module, wiring, and connectors, can help prevent issues that may trigger this code.

10. Can a bad fuel quality or fuel filter issue trigger OBDII code P025A related to the Fuel Pump Module Control Circuit/Open in a Mercury?

- While fuel quality and a clogged fuel filter can affect the performance of the fuel system, they are not typically direct causes of the specific issue related to code P025A.