i checked all my sensors on the outside and cleaned them all off but the problem is still there. i read an article on how to get to the pdc unit and but when i came to do it i was rushed for time as i was due back in work and it seemed a bigger job than 1st thought .as it is under where the spare wheel goes.also im a bit confused on how to get to the connecters, do you have to take the bumpres off or do the pull out????????????