Whats causing a transmission problem with my 2003 Honda Accord?
I have a 2003 Honda Accord EX V6 sedan with the five-speed automatic transmission. My car has developed a shifting problem. Sometimes it shifts very roughly. Other times it doesn’t shift at all, or the engine revs and it feels like it can’t find the gear. Tonight the check engine light came on and the D4 light started blinking, but I haven’t had a chance to get it scanned yet to find out what the trouble codes are. A: The best way to be sure of any transmission issue is to have a qualified transmission mechanic diagnose the problem. If your D4 light is flashing, you definitely have a tranny issue. To continue to drive it, will further damage it.