OBD code P0087

Measured fuel pressure is lower than the ECU is requesting, which is critical on common-rail engines.

Estimated severity

High

Common symptoms

Noticeable power loss
Limp mode when the engine is under load
Engine stumbles or stalls under acceleration
Long or irregular starting
Higher fuel consumption or smoke from poor combustion

Likely causes

Blocked fuel filter
Weak low-pressure pump or air entering the fuel line
Worn high-pressure pump
Faulty pressure regulator or metering valve
Excessive injector leak-off
Fuel rail pressure sensor reading incorrectly

Recommended checks

1. Check or replace the fuel filter if maintenance history is unclear.
2. Measure low-pressure and high-pressure fuel supply during cranking and under load.
3. Compare target and actual rail pressure in a controlled scanner test.
4. Perform an injector leak-off test on diesel engines.
5. Check for air in the system or leaks in fuel pipes and connections.

What does code P0087 mean?

Code P0087 means the fuel system cannot reach the required pressure. On common-rail diesel engines, it often appears during acceleration, hill climbs or when the van is loaded. Causes include a blocked filter, weak supply pump, faulty regulator, internal injector leak-off or poor fuel feed from the tank.

Try assisted diagnostics