Powertrain
generic / SAE
P0087
Fuel Rail/System Pressure Too Low
The ECU detects fuel rail pressure below the desired setpoint despite maximum pump and metering valve commands. Common in direct injection diesel and gasoline systems where high-pressure pump or rail pressure regulator fails.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number– / 87
Possible causes
- High-pressure fuel pump worn high
- Pressure regulator stuck open medium
- Fuel filter clogged medium
- Injector leaking back low
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 400–2500 €
- Estimated time: 2–8 h
- Component: high pressure fuel pump
- Component: fuel pressure regulator
- Component: fuel rail
- Component: fuel filter
- Component: fuel injector
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012