The P0087 engine code for low fuel rail or fuel system pressure only happens in cars with a common rail fuel injection system. It means the pressure in the system is too low to provide enough fuel to the engine.

To know how to prevent the P0087 code, you first need to understand how the fuel system works. Typically, these systems have a low-pressure pump in the fuel tank that feeds a high-pressure pump. The high-pressure pump leads to the fuel rail, a reservoir of high-pressure fuel that feeds the fuel injectors.

The powertrain control module (PCM) controls the output pressure from the high-pressure pump, increasing the pressure when you need more power and reducing it when you don't. A fuel rail pressure sensor sends feedback to the PCM about whether the actual pressure is as expected. If the pressure drops too low, you could get code P0087.

Symptoms of Code P0087

When you have low pressure in the fuel system, you may experience these symptoms of poor engine performance:

  • Stalling
  • Misfiring
  • Running rough
  • Reduced power
  • Decrease in fuel efficiency

Causes of a P0087 Code

Because the P0087 code is for the pressure in the entire fuel system, many different parts can be the cause. Here are the most common causes of low pressure in the fuel system:

  • Failed fuel pump
  • Clogged fuel filter
  • Damaged fuel lines
  • Faulty fuel pressure sensor
  • Malfunctioning fuel pressure regulator

Diagnostic Process

The specific process for diagnosing the reason for code P0087 depends on your car's make and model. Generally, you'll follow these steps:

  1. Use your OBD-II scanner to read the code.
  2. Inspect the fuel system components to find the likely cause.
  3. Use a fuel pressure gauge to measure the system pressure.

Fixing a P0087 Code

Because there's no single cause for this code, there's no one fix. Additionally, as with the diagnosis, how you fix the issue will vary based on your vehicle. It's a good idea to have your owner's manual handy for reference. Depending on what you found during your inspection, you may need to repair or replace any of the following parts:

Preventing Code P0087

The best way to prevent engine code P0087 is by maintaining your vehicle. Regular maintenance on your fuel system components can help you catch a dirty filter or worn fuel line before it becomes a more serious problem and triggers a code. You also want to use high-quality fuel that behaves as expected. Finally, avoid running low on fuel since a lack of fuel can cause a drop in pressure and trigger the code even if nothing else is wrong with the system.

Order Parts From StockWise Auto

Because the P0087 code indicates low pressure in the fuel system, you need to inspect all system components to find the problem. Be sure to diagnose and repair malfunctioning parts quickly to avoid damaging your engine. When you need replacement fuel system parts, order from StockWise Auto for competitive prices and quick shipping.