Hi guys, I have an 05 v6 with 192,000 mi. Lately at random times when I start up the motor shakes, then stops as the idle levels out. I've had the dreaded P0430 code for about a year, but have just lived with it. Tonight I went out and started it up, and this time the CEL blinked for a few seconds then went steady again. My mileage has been slowly dropping. I don't have a code scanner handy, but does anyone have an educated guess as to what it could be? Taking it to Limbaugh in Birmingham tomorrow to see if they can help me.