Hi Bill,
I beleive the done is needed like the five, five flashes of the
light before, because it sometimes take a while to run the full
diagnosis, and many times people give and saying their on and off
sequence doesn't work, unless we tell them to wait for the end of test.
God Bless America, ßill O|||||||O
http://www.billhughes.com/

Billy Ray wrote:
>
> Thanks Bill,
> The trip I was taking this afternoon was only a couple miles so the engine
> probably did not get to operating temperature. I understand that the P0456
> code is very common but what is the significance of the "done"?
>
> -billy ray