[veshant]

Hi,
I'm having trouble identifying what's causing my misfires on cyl 1,2,4. Just changed plugs, and tried swapping coils on 1&3 and it doesn't follow. I tried disconnecting the oxygen sensors and got the same codes except the additional codes from the oxygen sensor.

Codes I'm getting:
P0193 - FRP sensor high input
P0300 - Multiple cylinder misfires
P0301/2/4 - cylinder 1/2/4 misfire

Also got this but it cleared:
P0172 - System too rich, bank 1

Any help is appreciated, thanks!