I had this code (P145c), as well as P0497), after doing the valve adjustments and replacing the plugs. Self-inflicted in my case :frown: I missed replacing a vacuum line from the manifold to the Evap canister valve.
Check this youtube video for what sounds like a similar cause:

https://www.youtube.com/watch?v=m327HBfQbzI

I know its a CRV, but the system looks somewhat similar, and its in the same place.
This guy on Youtube is good: I followed his steps on the valve adjustment...

This fix should be straightforward I think

Oh, and I used the Torque Pro app and a OBD bluetooth adapter (from Amazon) to clear my codes, as well as check all the OBD information. There's a lot of interesting information to see !

 

Hello everyone. I'm wondering if there's anything more I can do before taking it into Honda. I as well got a gas cap message and then right away I got both codes P145C and P0496. I went out and bought an Innova 3100 DB2 scanner that's how I found my codes. Reading online I seen some people fixed it with a gas cap so I ordered both parts from RockAuto. A new Gas Cap as well as a DORMAN 911769 Vapor Canister Purge Valve / Solenoid. I replaced both and within a week I get the same codes back. Everything I read online always points to that part, is there another part next in line I could order and try before taking it in?

 

Would love to know if you find a resolution. I'm having a similar issue with my 2010. No codes though. Changed the gas cap and the solenoid. After replacing the solenoid, the alert went away only to return roughly 1800-2000 miles later.