2005 GTP, getting ONLY this code (other than my constant P0420 catalytic code) and my cruise control is intermittent.

This code seems to be a different cause and solution for every make and model so teh interweb hasn't been very helpful for this specific vehicle.

The brake pedal switch is cheap and easy to replace if that is indeed the problem, but it could be the sensor on the master cylinder = $ or the TCC = $$$ or any harnesses in between, so anything else I will just dealership it since I've got like 800 miles left in the warranty, but I wanted to hear from you guys first if anyone has any specific info or firsthand knowledge.

-Matt