AutoCodes – Cadillac – P0087 Cadillac

P0087 Cadillac 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 Cadillac 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 2,268

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 Cadillac 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 Cadillac - Fuel Rail Low Pressure - AutoCodes.com — P0087 Cadillac Code - Fuel Rail Low Pressure

What does this mean?

What are the Possible Causes of the DTC P0087 Cadillac?

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 Cadillac?

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 Cadillac 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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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 Cadillac Code

1. What does the OBDII code P0087 mean on a Cadillac?

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

2. What are the common symptoms of code P0087 on a Cadillac?

Symptoms include engine stalling, rough idling, reduced acceleration, decreased fuel efficiency, and potentially the vehicle entering limp mode.

3. What causes the P0087 code on a Cadillac?

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

4. Can a dirty fuel filter trigger the P0087 code on a Cadillac?

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

5. Is it safe to drive a Cadillac with a P0087 code?

Driving with a P0087 code is not recommended, as it can cause engine performance issues and potentially lead to more severe damage if not addressed.

6. How do you diagnose the P0087 code on a Cadillac?

Diagnosis includes checking fuel pressure with a gauge, inspecting the fuel pump and filter, and using a scan tool to verify fuel pressure sensor readings.

7. Can a bad fuel pressure sensor cause the P0087 code on a Cadillac?

Yes, a faulty fuel pressure sensor can send incorrect readings to the ECU, triggering the P0087 code.

8. How can the P0087 code be fixed on a Cadillac?

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

9. How much does it cost to fix the P0087 code on a Cadillac?

Repair costs vary but typically range from $150 to $1,000, depending on whether the issue is a simple filter replacement or a more expensive fuel pump repair.

10. Can low fuel levels cause the P0087 code on a Cadillac?

Yes, running on a very low fuel level can cause the fuel pump to struggle, leading to low fuel pressure and the P0087 code.