I have a 2005 crossfire and a wrench 409 popped up on the dash. What does this mean? Also when I was driving it yesterday, hot heat came out the passenger air vent for a brief moment and then it went back to cool, what was that

 

The wrench and 409 mean you are 409 miles past your scheduled oil change, that is if it was reset after your last one. It is in the service portion of your owner manual.