P0087 - FUEL RAIL/SYSTEM PRESSURE - TOO LOW

In vehicles that have the fuel supply without return, the fuel pump has a pulse width modulation allowing in this way to vary the speed of delivery of fuel to the rail. In this way the fuel pump does not need to work constantly, in addition to regulating the fuel pressure returning it to the tank.

The FRP sensor (Fuel Rail Pressure) is the one that monitors the fuel pressure in the rail. Determine the proper pressure of this, in addition to varying the speed of the fuel pump according to the pressure.

If the PCM (Powertrain Control Module) detects that the fuel pressure is below the specifications for the supply ordered by the fuel pump, the DTC code P0087 OBD2 is established.

• Check Engine light turns on.
• There is a misfire.
• At higher speeds, there is instability in the acceleration.
• Fuel consumption may increase.

The factors that can lead to the establishment of the P0087 OBD II fault code are:

• A fuel filter may be clogged.
• A defective fuel line.
• There is an incorrect reading by the Fuel Rail Pressure Sensor (FRP).
• The fuel pump may be defective.

The steps to solve the diagnostic code P0087 correctly are the following:

• Performs an inspection of the fuel tank, also of the fuel lines. Repair or change one of these components if you find defects in them.
• Change the fuel filter.
• Disconnect the fuel pump and check its status. Change it if necessary.
• Change the Fuel Rail Pressure Sensor (FRP).