ecu reset screw
on the back, nissan gave us a reset screw. with key on/engine off, use a small standard screwdriver turn the screw till it stops. return it to its starting position, you're done! no waiting!! this will reset the ecu and clear any stored codes.
to retrieve codes just turn it the 1st time and count the flashes (long and short) of the MIL. return it to starting position, codes cleared.