Fuel · Severity: High
P0087 — Fuel Rail/System Pressure Too Low
Measured fuel rail pressure is below the value requested by the ECU.
Common symptoms
- Loss of power under load
- Hard starting
- Engine stalls
- Limp mode
Likely causes
- Clogged fuel filter
- Weak low-pressure pump
- Worn high-pressure pump
- Faulty pressure regulator or rail sensor
- Injector leak-back (diesel)
First test to run
Log desired vs. actual rail pressure during a full-load acceleration; then check low-pressure supply at the filter.
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