does it display that every time? or just sometimes? and does it do it while parked, or only while you're moving?
i've had a similar screen on my install-- it's due to the vibrations constantly unseating the ram. my most recent try at a solution was to fold over a towel and stuff it under the board to give the ram slot some backing force. so far, i have not had a issue again, but i haven't ruled it out yet..