Every time my 477 gets a hickup on the startup the yellow engine light stays on. Usually it is a "low battery" warning with occasional "injector problem". In any case its all bullshit and just a plain PITA. So far I had to wait for the next visit to the shop but now this is over: I connected a bluetooth dongle and got the TORQUE app in the google app store. It costs a few pennies but is worth all of it and more. lights are off automatically and as soon as I find the time I will dive into the 1000 other things this app can solve/figure out/show.