for the past 3 months the esp and service light will come on and stay on on my 172 till i turn the engine off,so i took it to my local renault specialist who put it on the computer which came back as faulty break sensor switch.since then when i go over speed bumps or at a crawling speed the esp light will flicker and the car will shake quite bad and the wheels will lock and make a screeching sound! so today i had the sensor changed and the faults cleared but on the drive back the lights came on again! can anyone shed any light to whats going wrong as im getting pi**ed off with it now. thanks