Originally posted by brapple:


any other thoughts about why the first time the cel turned on for a day then went off again, it was in teh computer as a stored code, then and now



My '99 acted the same way....the CEL would come on for a few days, then go off for a few more days, then back on again. Finally, it would stay on continuously. I think the reason the light went on and off was that the cat performance was marginal...under some circumstances the cats worked well enough to satisfy the computer, and other times, performance was just above the 'alarm' point.

My CEL has been on due to both precats being bad for the last 60,000 miles, and it will probably stay on until my car hits the junkyard.

-Mark- '99 Mystique LS, totally original (including the original water pump and the premium stereo)! Bought new in December 1998 for $21,000. 208,000 miles