My ABS light stays on with no codes showing up on my OBD2 reader. We've checked the electrical circuits to all sensors and they all work.

We once replaced the front right sensor and the light turned off for 30 minutes before turning back on. I have yet to check for any mechanical issues. Does anyone have a lead to the problem or heard of any similar issues?

Are you looking with basic obd code reader?
If so these dont show abs code's they only read engine ECU problems