Today after a short road stop my abs light together with handbrake light stayed on with pump buzzing. The ABS is not working (the wheels are locking). Both lights stays on just the moment you turn the ignition on and also the pump buzzing all the time. The pedal became softer too but still good brakes. Possible causes?

 

Forget to say that brake fluid level is higher than before when car working.

 

Well it is weird but problem dissaperared. Now working correct... Still what is the cause for that issue? What should I check?

 

Oh come on nobody knows something about this?