My "D4" light doesnt come on, all the other lights are OK (P, R, N, D3, 2, 1) if the light is broken, is it replaceable? Honda dealer replaced my transmission and dont know if the D4 broke when they replaced my transmission or it just broke after awhile.

Ill definitely bring this to Honda, but I just want some heads up just to make sure they dont screw me up with unnecessary charges, you know what I mean Thanks guys!