Look so that the oil is contaminated, nothing has to do with the sensors, but in the engine time the combustion chamber with gasoline is flooded when it opens the exhaust or admission valve tends to climb and mix with the oil, you hit the pulse of the injectors of the cables not the injectors themselves, because sometimes it happens that they saturate and are open all the time instead of closing and open, this can be checked Injectors with the vehicle walking if there is no variation are passing fuel continuously.