one works, the other doesn't

I went into the Social Security office this morning. As I didn't have an appointment, I had to wait an hour and a half to be seen. (During which I got a lot of reading done.) But when I was seen, the man didn't try to tell me that I could have gotten my 1099 form online. He just took my ID, confirmed my name and address on their system, and grabbed the form from the printer. Out and done in two minutes, and I didn't have to wait for it to arrive in the mail.

Meanwhile the "check engine" light came on in my car. This has happened before. It's usually a phantom alert from an emission control system; at least, the shop was unable to find anything when I asked them to take a detailed look. On another occasion, the same shop just plugged in a reader device and read off that it was the same thing. I asked them to cancel the alert and was on my way.
So I stopped into that shop to ask them to do that, and the guy was a different guy than the one I had before, and he wanted to argue with me. He wanted to take the car in for several days to run a full diagnostic (something which I didn't need; the body shop had done that last week). I asked him just to tell me what the alert said, and we'd figure out what to do next then. If it was the same phantom alert, just cancel it and I'll be on my way. But no, this guy was determined. He told me I was trying to dictate their work. That was pure projection on his part. He was trying to dictate to me, that I should leave my car for days just to find out what the alert said. He got very huffy about it.
I left. I'm not going back there again, not with customer service that rude, condescending, and dictatorial. I went to an auto parts store which can't fix anything, but which will gratis plug their device in and tell you what the alert says. Sure enough, it was the phantom. I thanked them, and I'll let it be until my next servicing.