hey, I have a p0520 code. I went in replaced the oil pressure switch. before replacing it read a constant 4.7v at 102psi. after replacing it seems to function as designed. 21psi at idel and 45psi around 5k rpm. I didn't go higher as I never really do driving. after replacing switch I got 2 new codes 1 is u0140 the other is u011de. All bcm components function, the speed is close to what my GPS says. however I don't want to just clear and pray. I was hoping someone would have insight to the potential causes. I accessed the switch through the wheel well.

 

The pieces began falling vivaciously on Sunday, January 11, 1987 and it snowed routinely until January 14, leaving people deserted in their homes, vehicles covered under fronts of the white stuff and associations ill suited to open.