3.6 Pentastar oil pressure sender woes.....

So the ECU sends a signal to the sensor after the motor is shut off or possible prior to it being started to see if it returns the correct voltage? could the oil filter cap be the (pressure) problem? Its not cracked, new O-ring...says 25NM torque spec on the little 15/16 hex cap but getting a torque wrench on that is near impossible unless its a crows foot (dont have) or you take the intake plenum hose off. I just tightened it until it bottomed and gave it a little snug but it didnt move after that. Being plastic I didnt use much force on it but I can see its bottomed on the body and there are no signs of leaks at that point. Motor is very clean, never had a leak of anything on this.