How to fix the P0087 trouble code?
2 Answers
P0087 trouble code applies to all automobile manufacturers, meaning the fuel rail/system pressure is too low. The solution is to perform shot peening treatment on the high-pressure pump fuel regulator valve needle. This trouble code indicates that the electronic control unit (ECU) has detected that the fuel rail pressure is below the calibrated minimum value within a set time period. Here is the relevant introduction: The fuel system needs to maintain constant pressure. If the oil pressure is too low, the fuel injector will spray fuel too weakly or not at all. If the oil pressure is too high, it will damage the fuel lines or the fuel injector. This low pressure may be caused by issues such as the fuel pump, fuel pump control module, fuel pressure regulator, fuel pressure sensor, or fuel leaks.
I've been repairing cars for over a decade, and the P0087 trouble code is quite common—it indicates low fuel rail pressure. Don't rush into disassembling things randomly. I usually advise car owners to focus on checking these three areas: whether the fuel pump is working properly (older cars often have worn pump cores), if the fuel filter is clogged (it must be replaced every 30,000 kilometers), and whether the fuel pressure sensor is faulty. Just last week, a car owner fixed the issue by simply replacing the filter, saving both money and effort. If none of these are the problem, then use a diagnostic tool to read the data stream to check for fuel line leaks or ECU faults. Remember, the fuel pump wiring connector is also prone to oxidation—a quick spray of WD-40 might do the trick. Always wear safety goggles before working; getting gasoline in your eyes is no joke.
