no WRX dont really have a "safe" moad...they do but it doesnt effect its performance...from what i know it doesnt...with no cats CELS are very comon it doesnt seem to be anything wrong with the car...just pointless CELs...take it to mastro if u cant fix it and see what they say but they prollly say "oh what u dont have cats that will hurt your car"...the usual BS