jmzo6

I've read all the previous threads about this and know it usually occurs with change in tire sizes, but that is not my case. My stock 08 Z06 was fine for 17 months and over 8K miles and never threw that message until last month. It started a few times during letting up after moderate accel to 4th or 5th gear but certainly not in any condition to cause sensation of wheel slippage, and never did this in the past in identical conditions. Few days later the check engine icon came on and off to dealer for software update (catalyst), which took care of CEL, but Engine Drag control message came on more freq and in mildly driven situations. Went to dealer and they said all normal, no codes, nothing to fix. Next day after few Engine drag messages like recently, chimes come on and ABS warning icon comes on and messages of Service AH, Service ABS, Service Traction System. After car was parked for 1-2hrs and restarted, no messages or icons and driven 10 miles, no probs. Any thoughts on what to tell the dealer to do, really? I think I've got a glitch/defect in the ECM? Going to dealer tomorrow again.

2k Cobra

None of that stuff is normal, except possibly Engine Drag . Some of it could be serious. When you take it to the dealer, have them write up, document, your complaints of all the warnings.
If something happens later, you've got them.

Best of luck, 2k