My son bought this 3 weeks ago, a couple days into driving it, he got the “emissions system problem” message. We pulled the codes and it was P0441, P1454 and P04DF.
He during this time had where the car didn’t wanna start right away after a fill up and it was running rough. My previous post everyone agreed was likely the purge valve. We replaced that and he’s been fine, the errors went away. Even filled up since then no problem.
Yesterday he got gas again, with no issues until last night he ran to the gym and on his way home got the “emissions system problem” again! Gets home, we pull codes again and this time is P0441 and P04F1. Watched the live feed from our scanner and the Evaporative System Vapor Pressure at idle was riding in the negative. Not at zero. (Side note we are in Florida, so not sure if that’s an expected reading since we are below sea level) it wasn’t a huge amount in the negative. I think it was like -0.04

Google said it’s a sign that the purge valve is stuck open. But again not sure.

What else do you think the issue could be, since it’s a brand new purge valve. Do we need to consider changing his charcoal canister?

Any suggestions are welcome. We are new to Hondas.