I got this van today with P0193 Fault - Fuel Rail Pressure - Signal Too High. Cranks but No Start
I tested the FRP sensor and found a Good 5v, Earth but 4.8v on the signal wire. Tested all 3 wires back to ECU - No Fault. Continuity, Load test, Short to - & + X Contamination.
Fitted a second hand sensor I had in stock, it started and all good.
Customer shows me 4 FRP sensors in the glove box that he has already replaced in 4 weeks for the same fault. I tested them and they were all "Short to 5v Positive" pushing 4.8v on the signal wire.
An Hour later I get a call and the Van has broken down again.
What is causing this ? All help very welcome. Thank you