look in the passenger side near the door below the glove compartment, there is a screw holding the panel. unscrew it and flick the panel out, it should be held down by two clips, takes abit of force but you will not break it. Thats where the ECU is. This is a timely process... I would just go to the boot of my car, undo just the 'red' cable connecting to the battery leave it out for 5 minutes and step on the brakes a few times , plug it back in and it will all be reset. Oh dont forget to disable your alarm when doing so
You will need to adjust your clock and tune your radio stations back it after the process.
Not sure with other peoples experience with resetting the ECU, car runs smoother and feels more power.. don't know might be a mental thing.. hope it helps.