ABS Sensor

[Rustypipes12]

'09 TRX4 just replaced rear calipers, rotors, and pads all around. ABS, traction control, and 4wd servo warning lights had all started flashing. After the brake job lights went out for about 100 miles, then returned. My scanner showed "right front sensor" so I changed that and cleared the code. So far no lights. I guess I'll find out today when I take 125 trip to my cabin. I've never changed a wheel sensor before and I'm wondering if they are supposed to have grease on them? the hole wasn't packed with grease just some and the sensor looked pretty bad. Should I have filled the hole with grease before installing the new sensor? I took half a dozen cotton swabs and cleaned out the hole before installing the new sensor. Now I'm wondering if I should have done that,

 

[crash68]

The ABS sensor goes right into the front wheel bearing hubs, there's no issue with grease being on the sensor. There's people that will pump grease in through the sensor hole to add to the front wheel bearings.

 

[Rustypipes12]

Should I have refilled the hole?

 

[crash68]

An ABS sensor uses the collapse of magnetic field as the teeth on the reluctor ring pass by, it does not need grease on the sensor or in the hole to function.
Only reason to pump grease into the hole would be for the wheel bearing inside the hub.