P0087
UniversalFuel Rail/System Pressure - Too Low
The engine control system has detected fuel rail or system pressure below the level it expects. Fuel pressure helps deliver the right amount of fuel to the engine; if it is too low, the engine may run poorly, lose power, or stall. A code identifies a detected condition, not a specific failed part. A pressure-sensor or wiring problem can also affect what the system detects.
⚠️ Before You Begin (Safety First)
If the vehicle stalls, loses power in traffic, or is difficult to keep running, stop driving when it is safe and arrange assistance. If you smell fuel or see a leak, switch off the engine, keep flames and sparks away, and do not restart the vehicle; have it inspected. Do not loosen fuel lines or attempt pressure testing yourself, as some fuel systems operate at hazardous pressure.
Common Symptoms
- There may be no noticeable symptoms, especially if the condition is intermittent.
- The engine may crank longer than usual or be difficult to start if fuel pressure is insufficient during starting.
- The engine may hesitate, run roughly, or misfire if it does not receive enough fuel under the current operating conditions.
- The vehicle may have reduced power or poor acceleration because fuel delivery cannot meet engine demand.
- The engine may stall if fuel pressure becomes too low to sustain operation.
Common Causes
- Fuel supply may be restricted by a clogged filter, obstructed line, or another blockage.
- A fuel pump or its electrical supply may not deliver enough fuel.
- A pressure-control component may not regulate system pressure correctly.
- A fuel leak may reduce available pressure; visible leaks or fuel odor require immediate caution.
- A pressure sensor, its wiring, or its connections may report pressure incorrectly.
- Low fuel level or fuel contamination may contribute to a supply problem, depending on the vehicle and circumstances.
Diagnostic Steps
- Check the fuel level and, if it is low, add the correct fuel before further testing; very low fuel can affect supply on some vehicles.
- With the engine off, look from a safe distance for visible fuel leaks or signs of damage beneath the vehicle. Do not touch or loosen fuel lines; if a leak or fuel odor is present, do not restart the vehicle.
- Check whether the code returns after noting when it appeared and any related warning lights or symptoms. Avoid repeated driving if the engine is stalling or losing power.
- If you have a scan tool, record the code and available freeze-frame information without clearing it; this can help a technician reproduce the conditions.
- Have a qualified technician inspect fuel pressure and related electrical and control systems using procedures specified for the vehicle.
When to Call a Professional
A technician can compare scan-tool fuel-pressure readings with the vehicle’s specified data, check related codes and operating conditions, and test fuel delivery, electrical supply, pressure-control components, and sensor signals as appropriate. The correct test method and specifications depend on the model, year, and engine. Confirm the cause before replacing parts.
Compare component listings
Confirm diagnosis and vehicle fitment before buying. A listing does not prove that a part needs replacement. We may earn a commission from qualifying purchases.
Commonly Asked Questions
Does P0087 prove that the fuel pump has failed?
No. It indicates that fuel rail or system pressure was detected as too low. Restricted fuel supply, electrical issues, pressure control, leaks, or inaccurate sensor readings may also be involved.
Can I keep driving with P0087?
If the vehicle runs normally, arrange diagnosis promptly and avoid unnecessary trips. Stop driving when safe if it stalls, loses power, or is difficult to keep running. Do not drive or restart it if you find a fuel leak or smell fuel.
Could a sensor or wiring problem trigger this code?
Yes. A faulty pressure sensor, damaged wiring, or a poor connection can affect the pressure signal the control system monitors. Testing is needed to distinguish a signal problem from genuinely low fuel pressure.
Can I check the fuel pressure at home?
Fuel-pressure testing can expose you to pressurized fuel and requires equipment and procedures appropriate for the vehicle. Do not loosen fuel lines or improvise a test; have a qualified technician perform it.
Related Diagnostic Video
Browse Available Code Guides
Previous and next available guides in database record order, across makes. Adjacent entries may share a code number and do not necessarily describe related faults.