so I bought that 10 dollar code reader, I thought I would try to clear codes in my car, but no codes are set.
so it gives me an error message when I try to clear.

is that normal? wasn't sure if I have to set a code to let it do its work.

it does read the emissions ready i/m stuff so I think it is good, but wanted to see if it shows not ready to fully verify the functions.

I guess the fastest way is to disconnect the battery and let it sit for a bit?