You know you can pick up a cheap code reader and scan the code yourself, right? The one I have came with a listing of all the codes in the little manual that came with it. This way, you'll either know or at least have some hint as to what the issue is. And you certainly won't have to take the service dept.'s word for it if they tell you it's the CBE (e.g., if you scan it yourself and the code says there's a problem with the A/C, you'll know they're BS'ing you).

Gas cap here and if you ask me that gas cap is f'd. I've driven cars for 20+ years and never had an issue, but this one take at least two or three tries before it's really "ON TIGHT" enough not to cause an SES warning.

It's probably an evap code. Seems pretty common, and there's even a TSB for it! I had a CEL last week that was evap related. They cleared the alert, and it's been fine since. If it pops up again, I'll point them at the TSB they apparently missed the first time (it describes corrective measures, not just clearing the ECU).

Anyway, it's likely minor.