This is driving me nuts so any help is appreciated. A few seconds after I start the engine I get a series of 5 beeps (sounds same as Door Ajar beep but all doors are closed and Door Ajar light is out) that repeats itself 5 times. There is no Check Engine Light or other Warning Light when this happens and after the fifth time it stops. All the Warning Lights are coming on as they are suppsoed to when ignition is ON, there are no codes when I pull from the OBD2. Only thing I have done recently is disconnect the battery and install a K&N drop-in filter. Is this just a Battery disconnect cycle check that lasts for a certain number of keyturns before the system clears? Anyone run into this before and know what it is? Right now I'm not too concerned as there are no Warning Lights or Error Codes but it is just damn annoying driving down the road listening to this thing beep at me. Thanks for the help.