How to Deal with P0087 Rail Pressure Too Low?

[MacWyatt]

Check the gasoline filter of the Magotan to see if it is blocked by foreign objects. 1. Possible Causes: If the rail pressure is shown to be low, first inspect the high-pressure fuel pump before checking the low-pressure fuel pump in the fuel tank. It could also be due to plunger wear, common rail pressure regulator failure, or ECU malfunction. 2. High-Pressure Fuel Rail: The high-pressure fuel rail in the Magotan is used to store fuel and suppress pressure fluctuations caused by the high-pressure pump's fuel supply and the injector's fuel injection, ensuring stable pressure in the driving system. The high-pressure injection pump needs to deliver fuel to the rail, which then sends it to the injectors. 3. Analyzing the Fault Point: When the Magotan experiences low rail pressure, for a direct-injection engine, it could be due to a damaged fuel pump or high-pressure pump pressure sensor. It is recommended that the owner visit a repair shop to read the engine control system fault codes with a computer for a precise diagnosis of the fault point based on the codes.