Luckily this is my first post on this site, but I'm addicted to reading on here so maybe I can get my own answers now, lol.
I got a 2013 Impala I got for a steal a while back, but I've only been able to get to fixing it for any use within the past few months. Was running perfectly after some...
did a smoke test no leaks. replace the necessary parts: purge solenoid, vent solenoid, tank pressure sensor. only thing i did not replace the canister and gas cap. disconnected the battery for a while reconnected and drove about 20 miles and engine light came back on.
I had a check engine light with P0446 code and no hiss when opening the gas cap so I started with changing the gas cap - no change
The purge valve solenoid - no change
Vent valve solenoid. - same, code is still there, still no hiss
So I started looking for leaks - no leaks anywhere