Check Engine Light

my check engine light came on today on the way home from work and has not gone off.

The Engine code i get when scanned is: P0454

any ideas before i take it in to the dealer (under warranty)?

why waste time when they could do it?

ok
i was just wondering if anyone knew off the top of there head.

is it O2? i cant remember...

it has to do with the evap system

P0454 Evaporative Emission Control System Pressure Sensor Intermittent

not sure what it means...

P0455 is usually gas cap...

i cleared the code just to see if it would come back on again before i took it to the dealer, it has not come back on yet :)

just a glitch maybe...

Check you gas cap you will sometimes get this if the gas cap is loose.

My check Engine light has been coming on and off for 6 months now, mostly on, I have it connected 3 times to the computer at the garage and I have gotten 2 error codes (can't remember what the actual numbers were) the first and the third were throttle sensor error
and the second was transmission not shifting from second gear (that one was recently only 3 days ago. had drastic loss of power, when from 60 kph to 20 kph on a hill....not fun and it was late at night when this happened too...)

I had the same issue, and like the knucklehead I am, I ignored it after it went off. Finally I got a letter from the state telling me I had to pass an emissions test before I could reregister the car. I took it to Pep Boys, they got three codes and told me to go to the dealer. I want to the state inspection depot and they got three totally different codes. I finally went to the Chevy dealer and they got five completely different codes. Final verdict: replaced ALL the sensors and spark plugs. Total plus labor :$1,033. Maybe it would have been lower if I went earlier. Moral of the story, don't ignore your CEL.

I had a camshaft position sensor glitch on me, cleared it and no problems so far. If the light comes back on for any more sensors I will have some bucks to scrape up though.

The damn thing has come on again! Less than a month after spending a thousand bucks getting it fixed. I'm still paying for the first repair. Going back to the Chevy dealer is a nonstarter. I have absolutely no more money to give those clowns. Otherwise the car seems to be running fine. This seems to be an endemic Aveo problem.