AutoCodes – Buick – P0087 Buick

P0087 Buick Code - Fuel Rail Low Pressure

Quick Answer

The Engine Control Module (ECM) uses the Fuel Rail Pressure (FRP) Sensor to determine fuel pressure to the fuel injectors. Common causes include Blocked Fuel Filter, Faulty Fuel Rail Pressure (FRP) Sensor, Fuel Rail Pressure Sensor harness is open or shorted. 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 Buick indicates Fuel Rail Low Pressure.
Common causes: Common causes include Blocked Fuel Filter, Faulty Fuel Rail Pressure (FRP) Sensor, Fuel Rail Pressure Sensor harness is open or shorted.
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 1,772

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 Jul 15, 2022

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

The Engine Control Module (ECM) uses the Fuel Rail Pressure (FRP) Sensor to determine fuel pressure to the fuel injectors. This is then compared to the calculated target fuel pressure as determined by the ECM. The ECM adjusts the FRP by modulating the duty cycle of the control driver of the fuel pressure regulator. Injector pulse duration is determined by the measured rail pressure and the target injection fuel into each cylinder. If a sensor circuit malfunction is detected, or the commanded fuel injection pump flow is not within the proper range for a given engine load and speed, the Diagnostic Trouble Code (DTC) will be set.

OBDII Code P0087 Buick - Fuel Rail Low Pressure - AutoCodes.com — P0087 Buick Code - Fuel Rail Low Pressure

What does this mean?

What are the Possible Causes of the DTC P0087 Buick?

Blocked Fuel Filter
Faulty Fuel Rail Pressure (FRP) Sensor
Fuel Rail Pressure Sensor harness is open or shorted
Fuel Rail Pressure Sensor electrical circuit poor connection
Faulty Fuel Injector
Faulty Fuel Pump

How to Fix the DTC P0087 Buick?

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 Buick 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 Help with the Code?

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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 Buick Code

1. What are common symptoms of OBDII code P0087 in a Buick related to low fuel rail pressure?

- Common symptoms include rough idling, engine misfires, lack of power, and potential stalling.

2. What are the primary causes of OBDII code P0087 indicating low fuel rail pressure in a Buick?

- The main causes can include a faulty fuel pump, clogged fuel filter, fuel pressure regulator issues, or a leak in the fuel system.

3. How can I diagnose the issue causing OBDII code P0087 in my Buick?

- Diagnose the problem by checking fuel pressure with a gauge, inspecting the fuel pump, testing the fuel pressure regulator, and examining the fuel lines for leaks or blockages.

4. Can a dirty fuel filter trigger OBDII code P0087 in a Buick?

- Yes, a clogged or dirty fuel filter can restrict fuel flow and lead to low fuel rail pressure, triggering the P0087 trouble code.

5. What are some repair tips for addressing OBDII code P0087 in a Buick?

- Repair tips include replacing the fuel filter, inspecting and potentially replacing the fuel pump, checking for leaks in the fuel system, and ensuring proper fuel pressure regulation.

6. Is it safe to continue driving my Buick with OBDII code P0087 present?

- It is not recommended to drive the vehicle with code P0087 as it can lead to engine performance issues and potential damage if left unresolved.

7. Can a failing fuel pressure regulator cause OBDII code P0087 in a Buick?

- Yes, a malfunctioning fuel pressure regulator can disrupt the proper fuel pressure in the system, triggering the P0087 trouble code.

8. Are there any specific Buick models known to be more prone to experiencing OBDII code P0087?

- While this code can occur in various Buick models, it may be more commonly reported in vehicles equipped with direct fuel injection systems.

9. How much does it typically cost to repair OBDII code P0087 in a Buick?

- The cost of repairing code P0087 can vary depending on the exact cause of the issue, but it may range from $200 to $800 or more, including parts and labor.

10. Can a DIY enthusiast with basic automotive knowledge address OBDII code P0087 in a Buick themselves?

- While some aspects of diagnosing and repairing P0087 may be tackled by DIYers, it is recommended to consult a professional mechanic for accurate diagnosis and proper repair to ensure safety and effectiveness.