If you actually fixed the problem, it should turn itself off. If memory serves me correctly (and it probably doesn't) the local repair shop said to me many years ago you had to have 5 starts and drive at least 40 some-odd miles for the light to clear (or something along those lines).
Or, go to Autozone.
Or, go to Harbor Freight on-line and buy a $40 code reader. It'll reset the light.