FYI cam & Crank codes

I recently ran into a problem with 2 nissans both came in with codes for a crank sensor fault they were stalling for no reason i replaced the cam and crank sensors in the first one and three days later it returned with the same problem low and behold i had missed a TSB that was mixed in with the no start problems on all data but not under drivability calling for you to flash ECM with updated cold start and warm running perameters for crank sensor after replacement i sent it to the dealer two weeks later still running good i did the same with the second no problems