Thank you guys but I can't imagine how the "tip" of the sensor can wear out, which tip are you talking about? There are only 2 plastic walls right and left next to a small metal piece, and with a small clip around the metal piece so that the sensor fits in, I can't imagine how the sensor itself would wear, isn't there a wire or a loop in the pad that actually wears out and that breaks the continuity of the circuit? Because otherwise I can't figure out how that works based on what I've seen :shrug:

one pict is Worth thousand words

http://rovermg1.free.fr/rovermg/thum...pDg5E0eQnX.jpg

Mike

Ok so if it is the loop of wire in the pad itself that wears down as I was thinking and not the actual sensor itself that wears down, then why do people say that when you change the pads you should change the senors too? What is the point if they are not the wearable part and can be reused?

Sometimes if i hit a pot hole my pad indicator comes on :shrug: once the car is turned off and restarted later on the warning has gone until the next pothole sets it off!

Surely a poor conection somewhere in the circuits front /rear :shrug:

see preferably connector's pins

As in FrenchMike's picture. The sensor clips in to the pad, and as the pad wears away, so does the tip of the sensor, and eventually reaches the point where the wire loop in it is also worn away away and breaks the circuit, switching the warning light on.
Which is why a sensor cannot be reused once it has been worn away and the circuit broken.

Deductively coincidence aside. If you have been tinkering under the bonnet have you disturbed a connector or snagged the wire.
I once had a bent pin inside the connector not making contact, but the black plastic connector fitted together on its guides ok. 10 mins of head scratching then looked inside and saw the bent pin. Straightened it out with plastic tweezers

Took yesterday a look at the whole cabling system and couldn't find a problem, the pads are still 10mm thick botf front and rear, the sensors are not worn, but I know that the problem comes from the front because I bent a small metal bobby pin and stuck it inside the front loom comimg from the car's sensor connection to make the circuit closed again. I can only think of a front sensor problem, because the pad is good, and the connection from the car's end to the sensor connection is also fine because otherwise when inserting the bobby pin the connection wouldn't have gone closed thus the warning light disappearing :shrug:

I've had this problem for a while now after the light popped on after driving over a pothole, I tried all the previously mentioned ways to fix it but the light stayed on :( I'd learned to live with it but it's annoying at night because the IPK screen is always lit - I had wondered if you could bypass the circuit......so guess what I will be doing ;)