Wifey Mobile here. She'll drive it for a week or more and then out of the blue she'll tell me "there's some message on the thingy on car"
So I take a look sure enough "Engine System Service Required" indicator appeared (screen on left of dash). This was about 7-8 months back. Car runs excellently. I connected the OBD II reader, read codes = "PASS NO CODES". The I hit erase codes = "PASS NO CODES TO ERASE". I drive it down the road, punch it and allow to slow down, turn around and on the way home I notice the message is no longer there?

Then recently, Friday 5/20/11, Wifey tells me - well you know. So today I connect up the OBD II and same as above, nothing nada zip. Do the old erase codes and receive same message "PASS NO CODES TO ERASE". Drive it down the road punch it, turn around come home message still in window. Put the code reader away and figured I'd check liquids - all were fine. Start the car up and no message displayed???

Any ideas here? The car runs like a top when the message is present