CEL P0496 and P0442

[air713]

Hello all!


I'm looking for some guidance to *hopefully* avoid going into have my car looked at. 1) I like to learn and work on my car and 2) I am a bit of a cheapskate lol. I own a 1.8 Chevy Sonic LT Hatchback with about 57k miles. I have a couple car savvy friends who have told me the two error codes, P0496 and P0442, I have been getting aren't going to cause damage, they are just going to cause me to get a little worse gas mileage. Which I am fine with, but I'm also OCD and want to have my car running prestine as I plan to run my car until it can no longer function.

P0496-EVAP emission high purge flow fault
P0442- EVAP system control leak (small)

And before anyone asks, YES my gas cap is tightened and has a good seal. HOWEVER, I am 99% sure the flap inside my gas tank that you push a pump through has fallen in as it is no longer there lol.

Do y'all think that the flap could be causing these codes to be thrown? If so, how do I go about getting it out of my tank?

Is there any other way to check my EVAP system without taking it in?



Thanks in advance for any help y'all can give me.

-Air713

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[bluejay]

no but over filling ur gas tank will . there is a charcoal cannister inthere meant to suck up some of the fumes . if u continue filling ur gas tank after the pump has already shut off u could be filling that cannister with gas which would throw the evap codes . it could go away after the gas evaporates or u it could be going bad . not that big of a deal . the only problem this will cause u is u wont be able to pass emissions testing . try not filling the tank right up to the brim to see if anything changes . the hot weather we have been having lately doesnt help

 

[air713]

I will reset my CEL and try that. My OCD always kicks in and I always fill it up to make my amount end in .50 or .00 haha. I'll post updates once my system checks the EVAP again. Thank you

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[air713]

The results came back, this has not been able to resolve the problem. I'm thinking about having it examined by a tech, but would prefer to do this myself. Does ayone have some guidance on this?

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