It's possible AEM may be offering a solution for the CELs. I was browsing the AEM Forum on their website and came across this thread:
http://forum.aempower.com/forum/index.php?topic=17967.0
So, I guess you can e-mail that guy and let him know your problems, since a bunch of people on the AEM Forum with R18s are saying they're throwing CELs.
Sorry if this is old news, but thought I'd try to help those that have CELs and haven't switched to Injen yet. hehe.