When I start the engine and started driving after a couple of minutes d4 would flash, if I turn off the engine and turn it on again, flashes go away, but if I drive it, it comes back, it will only go away after the engine is turned on for 10 min or so. So what i do is I turn on the engine and leave it for 10 minutes before actually driving it. When d4 is flashing, the car runs slow even if i step on the gas. Can anyone help me with my problem?