I had this happen on my '04 when it was less than 6 months old. It freaked me out & I ended up getting it towed to the dealer instead of riding it, just in case. The dealer wasn't entirely sure of the cause but after testing he assured me the pressure was fine. He replaced the pressure switch which seemed to fix the problem, and ordered & replaced the wiring sub-harness in case moisture had gotten into it. It hasn't happened since.
