I have thought that as I have not used the car in a while, a bit of rust creeps in, which actually squashes the sensor, which makes it stick out a bit further…
had that once on a beemer… I took both rear wheels off, took out the rear sensors, wet and dried the holes the sensors were in,to remove the rust, this allowed the plastic sensors to go back to their original shape !!
Not sure about the ABS light but you have to turn the steering to both lock points ( fully left and right ) then turn the ignition off and on again to reset the traction control system after the battery has been disconnected.
When the battery runs low or has been disconnected the ABS & Traction Control warning lights will always show…start the engine & turn the steering to full lock both ways, this should remove the warning lights…they should also disappear after 4 or 5 ignition cycles.
If they’re still there after trying these 2 options, then you may have a problem…