that’ll depend on the scanner. If it only reads to codes then you are okay (even so not sure why you would;-) If it places your vehicle into diagnostics mode then it is not okay to drive around with it. Take a look at your scanners manual and see what it says about the scanning etc.
[++https://www.elmelectronics.com/wp-conten... Looks like it’ll be okay.
You will notice immediately if it is not. your car may go into limp mode etc. I still wonder why you would want to drive around with your scanner attached :-)