P0456

03MaineSXT · Post by **03MaineSXT** » Mon May 23, 2011 6:28 pm

this is the code i was given and i couldnt find it in the list viewtopic.php?t=43&highlight=egr+valve
but i know from our scan tool that it is emissions related. any ideas?

quicksilvr · Post by **quicksilvr** » Mon May 23, 2011 7:22 pm

0456 - Evap Leak Monitor Small (0.020) Leak Detected A small leak has been detected in the evaporative system.

Most PITA problem ever, if it's NOT your gas cap. Basically check your gas cap and make sure it's tight. Or replace it if you think it might not be sealing. Besides that, small EVAP leaks are hard to find. I don't know of any obvious area's to check on the Neon specifically, but someone else might.

00Neon RCR · Post by **00Neon RCR** » Mon May 23, 2011 7:24 pm

you have a small evap leak somewhere. Being a NGC car (I'm assuming by your signature) that a few people have been having this problem and it has to do with a "thing a ma-jig" in underneath the car at the rear... PM Dante, I beleive I saw him post a pic here a while ago.

g_force58 · Post by **g_force58** » Mon May 23, 2011 11:40 pm

If you find the leak in your EVAP system, please share your findings. I have had this for 2 years now and haven't found it yet! I even had the system smoke tested in sections with no obvious leaks.

I love my Neon, but sometimes she is a PITA!

darthroush · Post by **darthroush** » Tue May 24, 2011 2:56 am

Mine was caused by the large vacuum line coming off of the carbon canister being cracked. I sealed the cracks up with some cold wrap tape and Permatex.

ragek23 · Post by **ragek23** » Tue May 24, 2011 9:21 pm

i got small and large evap leak codes all winter and spring. now that its warm no codes. Love how my car heals itself. Wish it would fix its own dents :/