I have a 2017 Civic Si, that has been tuned to increase the power a bit. I've read (on a computer) that sometimes that has caused the problem below and sometimes it it happens to untuned cars.
I fire the car up and a couple times now all the dashboard warnings light up and every computer "helper" on the car errors out. Steering assist, traction control, ABS, Hill assist, charging system, etc, like literally every light on the dashboard. These warnings cycle through in a big warning string right in the middle of the dash, which is very distracting (and they come with a nice 'ding' every time too). Well, the first time it happened it freaked me out, even though the car continues to operate completely normally, no loss of power, no weird noises, anything. I took it to the dealer and they looked at it for a while and said "uh, we think your injectors need replaced" (turns out this is a common excuse and they don't really know why it happens) and though the car was tuned they supposedly replaced the injectors and gave the car back.
It was fine for a couple years but all the lights lit back up a few days ago. Again, no noticeable issue with the car in any way (other than the warning lights apparently kick out the ability for any of these assists to work properly, so brake hold is a no go, even turning the car off was tricky sometimes) and I re-read up on it, to find that lots of people had the problem and going in through the tuning software and clearing the errors also cleared up any of the issues.
All that to say that all the computery crap in our cars seems like nonsense and I'm really considering going back to the old times with a vehicle as well. If it weren't for poor gas mileage I'd buy an old beater truck and throw a new engine and all new brake and fuel lines in and gittyup.
