as above any ideas??

you got a bulb out mate, either that or you are using the 2 inner brake lights as fog lights

Have you recently installed (or modified the brake lights for) a rear fog light? If this isn't done correctly, or by not using relays, the warning light will come on under braking.

Or you've replaced bulbs with LED's.

Or you've replaced bulbs with LED's.

 

now thats true!

just got it, i will check thanks

it could be a bulb on the way out, mine came on and all the bulbs seemed fine and the next day the stop and tail light was out