What does it mean when the D4 light is blinking and how do I stop it. on 1994 Acura Legend

My car is an automatic and it drives ok for the most part but it does tend to be jerky between gears 1,2,and 3 there is no strange noises or anything but the D4 light is blinking should I be worried ???

Asked by for the 1994 Acura Legend
get a free diag and est from aamco then shop prices
thanks I will do that ASAP
1 more answer
Follow #1 advice , before it's to late. The 'D' light flashing means a trouble code has been set in the trans. control module. pressure switch failures were quite common , and not to big a deal. HINT --do not have trans flushed-drain&fills only , and use only Acura/Honda ATF.