P0087Fuel Rail/System Pressure - Too Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- On common-rail diesel and gasoline direct-injection engines, a high-pressure pump feeds the fuel rail, a sensor measures rail pressure, and the engine control module regulates it towards a target from its maps. P0087 is set when the actual pressure stays below the target by more than a threshold for some time. It is a system code: it does not say which component is at fault. Typical causes are a weak low-pressure supply, a worn high-pressure pump, a sticking control valve, a leak or a drifting pressure sensor; the engine usually goes into reduced power.
- What you may notice
- Check engine light on
- Loss of power or reduced power mode
- Hard starting or stalling
- Jerking under load
- Likely causes
- LikelyLow-pressure supply too weak: lift pump, clogged filter, low tank level or waxing
- LikelyHigh-pressure pump worn
- PossiblePressure control or metering valve sticking
- PossibleHigh-pressure leak or excessive injector return flow
- PossibleRail pressure sensor drifting
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €50 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.