removing abs sensors is a matter of luck. some come out with no drama whiles others are so corroded in the hole they need to be drilled out using progressivly larger drill bits.

if yours won't budge expect to spend a bit of time and lot of hassle removing it.

that said set your meter ohm setting to the first setting above 2500ohms and take a reading.

even if it comes within specs you might have a lot rust attached to the magnetic sensor end rendering the sensor useless.

remove caliper bolts and hang out of the way line still attached, remove rotor and then clean the sensor end well.

what will happen if it jammed in the hole is the guts of the sensor will come out without too much agro but the metal sensor casing will be essentially fused to the knee arm hole wall. this is where the fun begins

if the sensor was installed with lots of grease or anti seize coating around the casing wall they come out much easier