Iv been having problems with lights coming on etc on dash, no engine management though and it's not the valves as they were done months ago. Car goes into safe mode, turn off and back on and may happen again after five minutes or be fine for weeks!!!! Also noticed if at traffic lights etc not moving I have felt the passenger rear drop sometimes like the suspension is failing but then no problems!! Anyone else had this or know of what it could be??? Thanks car is 08 2.7 hse