Last week the tps sensor went bad. I replaced it and the car ran fine. Today my fiance took the car out and told me it was driving fine all day and then all of the sudden it started doing the same things that it did last time. The prior symptoms were high idle and running very lean. I am not home to see what it's doing but to get a headstart what might cause the tps to go bad if that is really what has happend again?