It's not like there's a state border check for vehicle emissions. You can visit California in a non-California car without an emissions check. Joy's claim doesn't make sense even before fact checking.
Imagine my surprise learning about them by pulling up to one. I don't think it was even near the CA/OR, but like 50 miles into Cali on the interstate. All of a sudden I see an officer flagging me at a little booth, I figured it was an emergency ahead or maybe I ended up on a toll road? The first thing he says to me was something along the lines of 'Got any fruit or vegetables in the vehicle?' And I just respond 'I'm sorry, what?' He must get that a lot, he pretty much waved me through as he was explaining.
I brought a prepackaged fruit cup my next trip just to see what would happen but I ended up doing the coastal route and never got stopped going that way.
I choose to hold two images of this in my head and they're both equally real, reality be damned.
They're looking for horse rolling papers and they're going to the trailer and asking each horse to show their papers as the driver is told to stand back and let them work.