[dghlsakjg]

Yeah, but you are still informed of, and sign agreement to the diagnostic fee.

They also won't charge you a diagnostic fee if they know ahead of time that it is a service they won't provide like in the example. If I somehow end up at the tire shop for an AC service, they don't send me a bill 6 months later for an arbitrary amount just because they had to tell me that I need to go to the shop down the road for my issue.

I don't live in the states anymore, but I genuinely don't understand how any of this is legal. If I started sending out invoices to every client months later for services that they didn't know they were getting, with arbitrary prices, sometimes with egregious errors on them, I would expect a knock on the door from the authorities.