Same thing happend to my car today. I drive a 97 Acura 3.0CL and check engine light when on and d4 blinks. Another thing, takes a while for the car to catch up speed dont know if this is happening to you. I got my CL on air ride suspension and ever since Iv had it that way its given me nothing but problems. Dont know if this kind of shhhhhh provokes stuff like this. Well anyways thanks for the help strykenyc I'll have mine check.