Hi all

My park assist wasn't working on my Tahoe 2007 and got the service park assist on the dash.
I had a bad sensor in the rear bumper that I found with the buzz sound test and replaced all of the sensors while I was on it.
Now the park assist works as it should but it is still throwing the service park assist message on the dash.
I have a decent code reader that finds the code B0959 - parking aid rear sensor circuit short to battery for all sensors now.
When starting up to drive no errors are set even if I back up but as soon as I drive for a bit the error is back on the dash.
what does even short to battery mean?

Thanks for any input
/Thomas