Ok, I have the dreaded "pegged high oil pressure reading" on my oil pressure gauge. I know I need to replace the sending unit. Does anyone know the correct part #. I see two different items listed. One is called a switch and costs about $15. The other is called a sensor and costs about $60. I ASSUME it is the one refered to as a sensor. Can anyone help me out. I called the Nissan dealership and they weren't much help. My truck is an 05 Nismo. THANKS!!!