yamah f150 sensor prob..

Hey guys! theres this yamaha f150aet thats recording some error codes.. after cranking the engine,the engines idles roughly and shuts down..we were told it was the water pressure sensor and it turned out to be right.. the part i dont get is that it also registered two other error codes, Oil pressure sensor and throttle position sensor.. Is that normal? is the water pressure sensor causing this error??? i need some advice please!!!!!!!!!!!!

[boats.net]

Do you mean the water detection sensor? If it was idling low and stalling it may show a low oil pressure and possible TPS code. Clear the codes and try again.

We already tried that.. erased the code and it still showed up! we tried reseting the ecu and disconnect the water pressure sensor and the engine worked perfectly and the codes tps and oil pressure sensor stop showing. after plugging it back in the codes show up again and the engine behaves badly again.. any ideas????? shall we replace the water pressure sensor?