P0087 — Fuel Rail/System Pressure – Too Low
Category: Powertrain Severity: High
Updated:
DTC code P0087 means: Fuel Rail/System Pressure – Too Low. It falls under the "Powertrain" category, with an estimated severity of High. Common causes include clogged fuel filter, weak low-pressure fuel pump and worn high-pressure pump (direct injection/diesel); it's worth confirming the diagnosis before replacing parts.
Possible causes
- Clogged fuel filter
- Weak low-pressure fuel pump
- Worn high-pressure pump (direct injection/diesel)
- Faulty pressure regulator
- Fuel system leak
Symptoms
- Stumbling and lack of power
- Hard starting
- Engine stalls
- Limp mode
How to diagnose it step by step
- Replace the fuel filter if it is high mileage.
- Measure low-pressure pump output.
- Compare actual vs desired rail pressure on the scan tool.
- Check the rail pressure sensor.
- Check injector back-leakage (diesel).
How to fix it
Start with the fuel filter (especially on diesels). Then measure low-side pressure with a gauge and high-side pressure with a scan tool to tell whether the in-tank pump or the high-pressure pump is failing.
Estimated repair cost
Filter: $30–120. In-tank pump: $300–800. High-pressure pump: $800–2,500.
Frequently asked questions
What does DTC code P0087 mean?
Fuel Rail/System Pressure – Too Low.
Is code P0087 serious?
Severity High. Have it checked as soon as possible, especially if it affects safety or the catalytic converter.
Can I keep driving with code P0087?
Not advisable: the engine can stall while driving, and on diesels a failing high-pressure pump can contaminate the whole system with metal debris.
Related codes
P0088 P0089 P0093 P0068 P0046 P0045 P0038 P0037 P0036 P0031
Refine by car make
🛒 Buy engine parts at Autodoc (affiliate link)