ABS Warning light Peugeot 307?

most commonly rear sensor goes, wires sometimes corrode, its worth checking resistance across wires. before buying a new sensor remove both rear sensors, clean all corrosion off the backplate and refit sensor. observe gap between sensor and wheel bearing, should be no more than 1-2mm. as close as possible to bearing without fouling it

louse grouse
May 2011

most likely is a wheel speed sensor,it's located behind each brake disc (look for a wire and trace it to the sensor). you can unplug it and get one from a scrappy £10...which one of the 4 is anybody's guess unless you get the car on a diagnostic machine ££££....a wee hint , both fronts and both rear will be the same so u can buy 1 of each and try them one at a time

david
May 2011