Hi Will.
We have a 2018 S60 T5 Inscription (long wheel base, Chinese build) with the 2.0 Drive-E engine. On a couple occasions we’ve experienced bad stumbling at the first stop light after filling the tank. I too suspected something going on with the evap system like fuel getting backed up into the vent hoses. The dealer attributed it to cheap fuel. BS!! Why did it do it only after fueling? I have since gotten in the habit of not forcing any fuel in after the nozzle clicks off the first time and I haven’t experienced the stumble in quite some time.
Have you tried clearing the codes after the fuel has burned down a way to see if they reappear?
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