hey your profile gives us no imfo to be able to help you, we need to know if it is a stick or auto, milage and any codes showing on a scan guage, or if the CEL(check engine light) is on. The only sensor i know of on the brake pad is a warning that sets the CEL if the brakes need replacement. try moving the steering wheel side to side then moving the key to several different positions. also you have to depress the brake pedal to shift an auto, I know this does sound simple but the neutral safety switch has proven to be the issue before.