what are the symptoms of a dodgy abs sensor?

would it stop me bleeding the caliper?

i changed the front discs and pads on my rs2000 and bled one side but the other wouldn't bleed for some reason but after a few goes it did let a little bit go but not much, not really enuff to ensure no air.....

anyways wen i brake, the same caliper is sticking on and i can feel wat must be the abs pump going.

if it is the sensor wat is the best method of cleaning them in case thats wat it is?

 

ABS sensor will only work if the wheels are moving.
When you bleed it have you taken nipple totally out to make sure it's not blocked?
Sounds like you have air in the system could be in the abs pump?
Could be a number of things.

 

as said above, it will be air in the sytem or perhaps a dodgy flexi hose etc.