sounds like the tester was having a bad day
but i to read 1mm on one tire and it is 1.6 for 3/4 of the tire minimum
10 year old car with steel brake lines are gonna be rusty im glad i bought a kit and the fittings and pipe to make my own up in the event of ether moms of dads car failing on the pipes
exhaust has to be sealed any blow with give a bad reading on the emissions test as i once found out
in my case what the car wants the car gets 🙂