going to get some work done on/under the front bumper and was wondering if there is a need to disconnect battery when taking out the PDC sensors?
any persistent errors on the OBC if you don't?
or is it safe enough if you just leave the car off until they are back in?

 

I did not run into any code problems, but i also did not start or put my key into the ignition when I pulled my bumper off either.

 

good to know. thanks. i assume same thing applies to removing fogs.