>check your brake fluid level. (probably the most likely
>culprit) our sensor is super sensitive. my brake light went on
>when the level looked fine - but I put more fluid in it and
>the light went off

What he said. Just had the same problem last week...added more fluid (after playing with the e-brake sensor for a few hours :) ) and finally realized it doubles as a low fluid indicator. Stupid, but it works.