[Pete-V70 D5 2003]

Had various issues related to throttle pedal recently ( I do realise it may have nothing to do with this as I had lots of random codes earlier in year but a good cleanup of ECM and fuse boxes/relays seemed to cure these) engine service light required comes on with drop in performance ranging from not a lot to almost limp mode but never quite. Took pedal off and clenaed up plug contacts and all seemed well although its now developed a sticky pedal which I cant get rid of: See log below. Nothing will clear the stickiness. I know I can get a used or new pedal, but will these need programming? And would say a focus with same part number be fine?
Also why does no one ever try to repair the pedals by undoing security screws etc? Im guessing good reason. I am hoping to perhaps undo pedal and gain some access to throtle pedal pivot pinion to grease it. thnx
Car runs fine otherwise.

Log

05-11-2020 Took pedal off and cleaned up contacts and lubed pedal. Now warnings over an hour drive but pedal now rubbing and sticking so wd40 or contact spray to blame there.

04-11-2020 Error codes now P193B and P1577 on an hour run the engine service light came on a dozen times in varying degrees of slowdown.
EGR System=INC
MIL Status OFF