Had a problem with abs sensor light coming on all the time so replaced the sensor with a new one and although the braking is no longer lumpy, the light is still permanently on. is this right? is there still a problem or does the compter need resetting or something? the haynes manual isnt very forthcoming with answers
Which sensor did you replace ? there should be one on each wheel behind the hub
could be anyone of these faulty or a corroded connection
another possibility is a build up of muck between the sensors and the toothed wheel on the back of the hub, i had this twice on my 407 - and a good jet wash sorted it both times
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First thought is that if you have a judder from the brakes you may have a warped front disc. The ABS system sensor may be picking this judder up and converting it to a fault.
A warped disc would spin and catch then spin and catch again rather like the rapid on/off braking that ABS does. This 'could' be the judder you feel and should be especially noticeable when braking and barely noticeable when driving with the brakes completely off.
I had same problem with wifes 307 estate but also had ABS light showing, removed cover on near side front wheel arch to check ABS ECU and found a wire fitted with a fuse that had blown, replaced fuse and speedo now working, ABS light still showing but am working on it, but now the ignition will not switch off and sometimes the engine continues to run on so we have to stall the engine to stop itas soon as I fix these problemsI intend to sell the car on, it has been a knightmare I suggest you do the same
Those are multiple problems. ABS is antilock brake system. Normally this comes on when you need to replace your brakes. Also replace the engine oil in your car and have your car tuned. The check engine light will more than likely go off. If not then the mechanic will tell you what needs to be done to make it go off. Hope this helps
i got exactly the same symptoms on my 407
after spending some time underneath i found that the ABS sensors on the inside of the wheelhubs were covered in road dirt
after CAREFULLY jet washing the area and carefully spraying with WD40 (dont get any on the brakes)
it the lights stayed off
other than that is most likey to be a faulty sensor