I noticed the CEL came on after about 2 months of first noticing the ticking. It came on after about an hours drive of pushing her hard. no issues since it was replaced, no ticking noise and a lot smoother idle.
after check engine light Eco is not working anymore with me, did u have the same issue ?
2013 one week old Laredo X package. CEL came up yesterday and ECO disappeared. I convinced the wife to trade in a 2010 Lexus RX450h hybrid for the JGC. Not a good start.
UPDATE 12/10/12: Stopped by to the dealer. It ended up been a gas tank cap leak and a sensor switch getting stuck. Both parts were replaced. As for the cylinder heads fear, the technician said the 2013 Pentastar V6 don’t have this problem. Let’s see. On the other hand, for the gas leak issues, I do remember over filling it (gas came out) twice before this happened. I have to be more careful.
Depends on why the CEL came on and which engine. I suspect some problems would make a Hemi forget MDS and never turn ECO on.
Just a bit of advice but just "CEL came on" doesn't tell us anything. When the CEL come on for a problem a code will be recorded that can be easily extracted by a simple and inexpensive tool. I don't leave home without one.