So I recently purchased an ‘08, and it displays the “Service Park Assist System” message in the overhead console.

I’ve replaced all four sensors, cleaned the harness connectors, checked as much of the wiring as I could get my eyes on and even swapped out two different PA modules and it still does not work.

At one point I did get a “Can’t communicate with park assist module” code after changing the module, which I cleared with my tuner. Made no difference. Disconnected the negative terminal many times between swapping out components. Same result.

I usually get the warning beep and four solid red lights in the rear bar whenever I put it into reverse. Sometimes nothing.

I know I’m probably going to be stuck going to the dealership, but does anyone have any ideas as to what else could be the issue here?