Changed oil pressure switch due to a P0521 code i changef and still have my check engine light on and still low oil pressure on gauge. Can someone help please ? Need to get inspected.

Many problems started close together…. Oil pressure stays fairly low, driving down the highway sudden loss of power went into limp mode only able to get it out by clearing the code with the scan tool and had to do this repeatedly, fuel pressure low, it starts cutting out and back firing around 1/4 tank of gas, lately it’s been idling high and it will return to regular rpm’s if I turn the steering wheel all the way to the left , it will slightly stack and cut out while driving especially upon taking off if the gas pedal is pressed to far and have to ease into little acceleration at a time but n… Read complete