ok, I'm new, Old,computer illiterate,and someone probably has asked this question a few dozen times, I've looked but can't find the answer. 2000 ultra glide,check light is on. Comes up with codes do1clr thru d10clr, followed by cal-03. Hard starting, backfiring, finally starts, then seems to run fine, throttle response and all. Just replaced all cam bearings, rear outer bearing blew up, took out oil pump,etc. put in a full kit with everything new. I don't know if the light was on when I got the bike, battery was dead. Did I miss anything or is the engine check light something else?