P0455 Evaporative Emission Control System Leak Detected (gross leak)

[weazul25]

Does anyone know what this means?? Just checked my computer for a SES light and this was the message the computer spit out.

Anyone know how to fix?? Large project or small project? $ or $$$$??

[JCL]

Gas cap loose? If not that, then some vent line from the fuel system.

Which model? Is it an E70, or is this post in the wrong forum?

[y5choi]

Emission control system huh? Sounds like the catalytic converter.. big Bucks to fix that one..

by the way, I am no expert.

[Penguin]

> Sounds like the catalytic converter..

That error has positively absolutely nothing at all to do with the catalytic converter.

It mean that it has detected a leak in the system that prevents gasoline vapors from escaping from the fuel tank and fuel system. It typically does this by periodically applying a vacuum to the system and sensing if the vacuum declines too fast.

Most of the time it is no more than a leaky or loose hose/line somewhere, or as simple as a loose or poorly seated fuel tank cap.

[weazul25]

Thanks everyone!!!!

Come to find out, my husband had just put gas in my X and somehow got the toggle line screwed in with cap. Who knew that they put sensors in those toggle lines????????????????