you need a tune to turn off the DOD. i think it might new lifter time for you. the dod uses the lifters to work the DOD. turning it off makes the lifters stay full i suppose.

there maybe a odb2 plug in like "pedal commander", for the gxp. might do the dod disable too. not 100% sure if they make one for your car tho, just know they are out there.