I hate to keep harping on this, but do you have the original battery in your 04? I am thinking that low voltage, especialy at idle, could cause this to come on, just as it comes on when you disconnect your battery. Just a thought.

James

I replaced my battery in my '04 BEFORE I had any trouble. 5-6 years on an OEM is borrowed time. It could leave you stranded at the worst time.