There are two specific locations on two specific roads where the MSP will engage even though there is no slippage whatsoever, and regardless of which direction I'm traveling. The only thing I noticed is that *both* are very close to police stations/cell towers, so I was suspecting that some type of electrical interference was wigging out the MSP. Anything similar near where you were getting the MSP light? Nuclear plant? Giant ball of plasma?
Thats interesting. My last car did a similar thing. Whenever I drove a stretch of road near GCHQ in the UK (GCHQ is a UK Government security comms site) my msp light came on. Doesn't do it with my new car though. Odd!