yea, if u disconnect the battery, i dont even think u have to wait 5 mins, but whatever... yea, if their is really NOTHING wrong with ur car, it should stay off, but if something is wrong, it will stay on, cuz mines went off b4, and then came on again later... and i did still have the problem, so i guess the few mechanics i went to were right, reset the ECU by the disconnecting the battery. good luck