I get these codes only when I get on the highway. Anything under 60 MPH will not set a code what do ever. Runs fine at all times even when ligh flashes. 240 miles I have done the following. T-belt, plugs,wires,coils, injector's,,fuel. filter, spray carb cleaner along intake & hoeses. And rotated tires.😕. Does anyone have a guess.