After market fuel cap issues?
 

Suddenly developed 18 fault codes (before I stopped recording them). Had these diagnosed at a non-Volvo shop.

Their recommendation was to replace my after market fuel cap with an oem, as a cheapest option before proceeding to expensive option. Seems implausible to me.

They wrote, ‘Found evaporative emission codes present. ...Further diagnosis of evap system could cost $270.’

Just thought I’d ask if anyone else has run into fault codes from after market fuel caps.

Yes I have.