D flashing light problem

Hello, it sounds like an electronic transmission issue,, possibly a pressure switch failure or some other concern. Electronic transmission diagnostic testing, including retrieving any diagnostic trouble codes (DTC's) that have been set and troubleshooting within those is essential as a next step. Do not continue to drive the vehicle as it is - the blinking light is to get your attention so you don't cause more damage. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops