Engine light is on, code P0087, fuel pressure lower than the reference value

2015 PEUGEOT 306

54,000 MILES • 1.0L • 3 CYL • 2WD • AUTOMATIC

KOOLYAAAR

MEMBER
1 POST

Engine light is on, we have replaced HPFP, fuel rail, and sensor and still light is coming on. We have access to a scanner tool and fuel pressure in the rail during live data is fine and above 3.5 bars. But still light come back again.

Dec 9, 2021 at 5:43 AM

JACOBANDNICKOLAS

✓ASE Certified Mechanic
110,194 POSTS

Hi,

First, this vehicle isn't offered in the US, so my technical information is extremely limited. However, I will try my best to help.

As far as the code, a P0087 is a general OBD2 diagnostic trouble code. It indicates a fault within the fuel delivery system. For this code to set, the ECM is being signaled from the fuel pressure sensor that the pressure is too low.

So, since you have replaced the sensor, pump, and so on, have you checked the wiring at the sensor itself for corrosion, a loose connector, or damaged wiring? Also, on the opposite end, the ECM, have you checked the connection for the same possible issues?

https://www.2carpros.com/articles/how-to-check-wiring

One last question. Have you confirmed fuel pressure is within specification?

Let me know.

Joe

Dec 9, 2021 at 5:11 PM

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