P0087: Fuel Rail/System Pressure Too Low
Fuel pressure in the rail is lower than the engine computer commanded. Very common on diesels (including Ram Cummins) and direct-injection gas engines.
Green, yellow, red: three ways P0087 can look
The same code can be a quick fix or a reason to pull over. Match your situation to the closest example.
Keep an eye on it
Set once after running low on fuel or right after a filter change, and it hasn't returned.
Schedule a repair
Power loss pulling a load, or hard starts. Change the fuel filters, then have fuel pressure tested.
Stop and get help
Stalling, no-start, or limp mode in traffic. Stop driving. On a diesel, starving the high-pressure pump can wreck it and spread metal through the injectors.
Symptoms you might notice
- Hard starting
- Power loss under load
- Stalling
- Limp mode
Common causes, cheapest first
- Clogged fuel filter(s) (most common on diesels)
- Air in the fuel system
- Weak lift pump or in-tank pump
- Worn high-pressure pump
- Leaking injector return or pressure relief valve
- Faulty rail pressure sensor
What you can check before calling
- Check when the fuel filters were last changed
- Make sure the tank isn't running low
- Look for fuel leaks
A code points to a system, not a part. Replacing parts based on the code alone is how people spend money without fixing the problem. Testing confirms the cause first.
Generic codes (second character 0) mean the same thing on every vehicle. Some manufacturers add their own details, so check service information for your exact vehicle.
Related codes
More fuel & air mixture codes
Look up another code
Cummins fault code (like 1922), J1939 SPN and FMI (like SPN 3251 FMI 0), or an OBD-II code (like P0420).
Questions
What does P0087 mean?
P0087 means "Fuel Rail/System Pressure Too Low". Fuel pressure in the rail is lower than the engine computer commanded. Very common on diesels (including Ram Cummins) and direct-injection gas engines.
Can I drive with code P0087?
It depends on what the vehicle is doing. Green: Set once after running low on fuel or right after a filter change, and it hasn't returned. Yellow: Power loss pulling a load, or hard starts. Change the fuel filters, then have fuel pressure tested. Red: Stalling, no-start, or limp mode in traffic. Stop driving. On a diesel, starving the high-pressure pump can wreck it and spread metal through the injectors.
What causes P0087?
The most common causes are: clogged fuel filter(s) (most common on diesels); air in the fuel system; weak lift pump or in-tank pump.
Is P0087 a serious code?
It can be. Stalling, no-start, or limp mode in traffic. Stop driving. On a diesel, starving the high-pressure pump can wreck it and spread metal through the injectors.
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