i think you are talking the check engine lite, there are no codes or diagnostics for the maint. required lite. to clear it hold the reset lite and turn the key on it will flash and once it stops flashing relaese the button if it goes out your done if it comes back on when you release the button keep doing it till it stays out. the check engine lite and maint. lite are two different theing even tough they are right next to each other.