need help replacing oil pressure switch on 2Gen MX6
 

I can see that the switch is leaking oil, and I have the replacement part, but I cannot figure out how to get access to remove the switch. I got the large socket (an oxy sensor socket) on the old switch but I can't get enough torque to turn the ratchet.

I guess some thing(s) must be removed --- any suggestions on where to start?

Thanks!