Aside from the usual advice about checking the piping and sealing surfaces for nicks/gouges which you have done, You may be obligated to have the issue diagnosed at a garage with a tester. OR a dealer.

There are many repeated complaints that aftermarket caps don't work as well as OEM. Just saying.

 

ive read some other threads about it possibly being a solenoid issue but these threads were on older models.

The 2011 is in the third generation, 2007-2011, so the numerous threads here apply. Fuel caps almost never go bad. The warning is there to make certain the cap has been properly tightened (to three clicks). If it's not tightened enough, it will issue the warning. If you get the fuel cap message enough times, your malfunction indicator light (aka "check engine" light) will display.

The solenoid is maybe $45 aftermarket, maybe $75 or so for genuine Honda. That's most likely your issue right there. Add labor cost if you can't replace it yourself. I can do it in a half hour. (I'm a frequent flier for that repair now. 😁)

The gasoline fill-up was a coincidence. Some solenoids can weaken over time (like in one of our 2009s, where it'd display the message a few times per month, until it became almost constant), or they could also fail suddenly--when I bought my '09 used over four years ago, the solenoid was bad when I bought it. In both cases, the solenoid was the fix.

 

The 2011 is in the third generation, 2007-2011, so the numerous threads here apply. Fuel caps almost never go bad. The warning is there to make certain the cap has been properly tightened (to three clicks). If it's not tightened enough, it will issue the warning. If you get the fuel cap message enough times, your malfunction indicator light (aka "check engine" light) will display.

The solenoid is maybe $45 aftermarket, maybe $75 or so for genuine Honda. That's most likely your issue right there. Add labor cost if you can't replace it yourself. I can do it in a half hour. (I'm a frequent flier for that repair now. 😁)

The gasoline fill-up was a coincidence. Some solenoids can weaken over time (like in one of our 2009s, where it'd display the message a few times per month, until it became almost constant), or they could also fail suddenly--when I bought my '09 used over four years ago, the solenoid was bad when I bought it. In both cases, the solenoid was the fix.

Do you recommend getting name brand honda or off brand (autozone etc) solenoids?

 

I think the light indicates your fuel cap is loose or missing. Don't forget to check if the cap has gone bad and so does the seal. Tightening the cap or replacing it with a new one can solve the problem.

 

Process for checking purge valve solenoid
Instead of using a scan tool, can use clips to terminals and apply 12 volts

Good luck