Abs Light - Help

[zena ellie]

Hi

 

I have recently purchased a 54 plate C3, since having this it has been into the garage twice for a noise on the brakes.

Over the bank holiday weekend the ABS light was coming on, I took it back to the garage they put it on the computer and told me no fault was coming up so the cleaned the sensor, the ABS light has come on again today.

 

Does anyone have any ideas what this could be.

 

Thanks

[paul.h]

Welcome to the forum.

 

Does the fault occur whilst moving or before setting off ? What was causing the brake noise ?

 

Your problem could be a faulty wheel sensor, a sensor target (front ones are part of the wheel bearing, rear ones inside the brake drum at the middle, looking a bit like an oil seal), dirt on a sensor or a rear target (the rear brakes may need cleaning out), a sensor wiring/connector problem, a tyre problem if not all worn similarly, the abs controller or valve/pump block. If you took it to a Citroen garage or specialist, I would have thought they should have been able to read the stored fault codes which would tell you which part was giving the problem.

 

Without diagnostic equipment you are limited on what checks you can do apart from cleaning and visual checks. On a sensor, if you unplug the wiring connector, with a meter, it may be possible to measure the resistance across it to see if all 4 are similar and none are faulty.

[zena ellie]

Thanks for the reply,

 

The garage changed the front brake pads and disks, and ABS comes on when moving.

garage checked and only fault code was signs of an emergency stop. they have since cleaned sensor and checked wiring, they said ABS was working fine.

and showed no fault codes.

[paul.h]

Changing front pads and discs would not involve the front abs sensors so the 2 are probably not related, unless possibly the wiring was caught.