i was wanting to find out if anybody could help me. I tried the key on key off for 3 times while pressing the odometer button and it came up CHEC in the display. so i let off the button and it come up trip 000000000. well finally it came up and started doing like little lines and everything. then all my dash lights come on and it goes right back to the regular odometer and everything. does this mean there are no stored codes or what? Thanks