Parking Break Sensor?

[ROMES]

Hey guys having issues i realized it when my top wouldnt go down- the parking break isnt sensing its in park. I came to this conclusion by checking the light on the dash and it not registering the break was up. after a few pulls it does register that the parking break is up and the top works fine.

So what part do i need to fix it? how much labor is involved ?

Thnx in advance fellas...