AutoCodes – Mercury – P0087 Mercury

P0087 Mercury Code - Fuel Rail/System Pressure Too Low

Quick Answer

The Fuel Pump (FP) Assembly contains the fuel pump and sender assembly. Common causes include Fuel filter plugged or dirty, Fuel supply line restricted, Faulty Fuel Pump Module. 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: P0087 Mercury indicates Fuel Rail/System Pressure Too Low.
Common causes: Common causes include Fuel filter plugged or dirty, Fuel supply line restricted, Faulty Fuel Pump Module.
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 1,843

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 11, 2023

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0087 Mercury Description

The Fuel Pump (FP) Assembly contains the fuel pump and sender assembly. The fuel pump is located inside the FP assembly reservoir and supplies fuel through the FP assembly manifold to the engine and FP assembly jet pump. The jet pump continuously refills the reservoir with fuel, and a check valve located in the manifold outlet maintains system pressure when the fuel pump is not energized. The Powertrain Control Module (PCM) regulates the fuel rail pressure by controlling the fuel volume regulator. This Diagnostic Trouble Code (DTC) is set when the PCM is no longer capable of maintaining the fuel pressure within the calibrated parameters.

OBDII Code P0087 Mercury - Fuel Rail/System Pressure Too Low - AutoCodes.com — P0087 Mercury Code - Fuel Rail/System Pressure Too Low

What does this mean?

What are the Possible Causes of the DTC P0087 Mercury?

Fuel filter plugged or dirty
Fuel supply line restricted
Faulty Fuel Pump Module
Faulty Fuel Injector Pump

How to Fix the DTC P0087 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 P0087 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 P0087 Mercury code?

Need more information on how to fix the P0087 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 P0087 Mercury Code

1. What does the OBDII code P0087 mean for a Mercury vehicle?

P0087 indicates that the fuel rail or system pressure is lower than the manufacturerâ€™s specified range, which can affect engine performance.

2. What are the common symptoms of the P0087 code in a Mercury?

Symptoms include engine misfires, reduced power, difficulty starting, stalling, and the Check Engine Light being illuminated.

3. What causes the P0087 code to appear in a Mercury?

Common causes include a failing fuel pump, clogged fuel filter, fuel injector problems, a faulty fuel pressure regulator, or issues with the fuel lines.

4. Can I continue driving my Mercury with a P0087 code?

Itâ€™s not recommended to drive with a P0087 code, as it can lead to further engine damage, poor performance, or potential stalling in dangerous situations.

5. How is the P0087 code diagnosed in a Mercury vehicle?

A mechanic will check the fuel system for leaks, test the fuel pressure using a gauge, inspect the fuel pump and filter, and verify proper operation of the fuel pressure sensor.

6. How do I fix the P0087 code on my Mercury?

Repairs may involve replacing the fuel pump, cleaning or replacing the fuel filter, repairing fuel line leaks, or replacing the fuel pressure regulator.

7. Can a dirty fuel filter cause the P0087 code in a Mercury?

Yes, a clogged fuel filter can restrict fuel flow, leading to insufficient fuel pressure and triggering the P0087 code.

8. How much does it cost to repair a P0087 code on a Mercury?

The cost varies depending on the issue. Replacing a fuel pump can cost $300â€“$1,000, while replacing a fuel filter is typically $50â€“$150.

9. Can bad fuel cause the P0087 code in a Mercury?

Yes, contaminated or poor-quality fuel can clog components in the fuel system and lead to low fuel pressure.

10. Will resetting the code fix the P0087 issue in my Mercury?

Resetting the code may temporarily clear the Check Engine Light, but it wonâ€™t fix the underlying issue causing the low fuel pressure. Proper diagnosis and repair are required.