i have a code 302 confirmed its still shaking. on 2007 Ford Taurus

i was told i have to let it cycle 150 miles for it to reset and stop is this true or do i need to do more work to fix the misfire. i have changed all spark plugs and cleaned the throttle body.

2 answers
Have a mechanc repair the misfire on cylinder # 2, if it is still misfiring, it will not clear up until fixed! After repair, the codes can be cleared to turn off the light.
this vehicle has wires so it may be plug wire. also this car has a history of the coil dropping cylinders so get it to a shop that can put it on a scope to see if it is a wire or the coil.