I've changed plugs & coilpacks & O2 sensors,& 2 injectors etc. Code P017 & p0175

What is your question?

I've had alot of different codes which I've fixed & replaced & it's always having another Coilpack go out which I know in Failsafe mode it has 2 coilpacks that stop working to keep u from hurting motor.but I've got a code P2198 also & Im thinking it's a stopped up Catalytic converter or another injector may be bad but I replaced 2 injectors & Rd moved the rest & cleaned & checked to make sure they were working correctly ! U NEED Some MAJOR HELP PLEASE!!!