P0087
PowertrainFuel Systemhigh severityFuel Rail/System Pressure - Too Low
What P0087 Means
The fuel rail pressure is lower than the PCM commanded value. Common in direct injection and diesel systems.
Symptoms
- Check Engine Light
- Loss of power
- Engine stalling
- Long crank times
- Rough idle
Common Causes
- Weak fuel pump
- Clogged fuel filter
- Fuel pressure regulator failure
- Fuel line leak
- Faulty high-pressure fuel pump
Diagnostic Steps
- Check fuel pressure with gauge
- Inspect fuel filter
- Test fuel pump volume
- Check for fuel leaks
- Test fuel pressure regulator
Where to start: Replace fuel pump, filter, or pressure regulator as needed.
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