The Check Engine Light may illuminate due to an evaporative emission (EVAP) system fault. Our technicians tell us these EVAP system faults can be difficult to diagnose but it is not uncommon to find a failed charcoal canister or a loose or worn gas cap.Google+
Car Problem Reports
Toyota Matrix Check Engine Light Due to EVAP System
Toyota Matrix Problem
Average Mileage: 116,400 mi (46,000 mi - 199,000 mi)
Visitor, 2004 Toyota Matrix
I have this same problem. It does go away after a while. But it seems to happen when the humdidity is high
engine light came on. dealer said it was from loose gas cap.
Visitor, 2003 Toyota Matrix, 145,000 mi
Whenever I would gas up, the light would come on and stay on for the first half of the tank..then go off.
I failed an inspection because of it.
I paid more than $400 to two garages and never got the problem fixed...finally registered the car in Florida and I don't need an inspection.
Visitor, 2004 Toyota Matrix, 46,000 mi
check engine light came on; Toyota replaced the gas cap and then told me the 'sleeve' from the cap to the gas tank needed to be replaced ($1200); they said it is a problem with 2004 Matrix's but since I had the repair in 2010 I was out of warranty##**!
Visitor, 2004 Toyota Matrix, 199,000 mi
check engine ligth on code#po441
i dont know if its the evap system however my car trys to stall and looses power for a couple of seconds..after that..runs great