I just rotated my tires recently and am trying to rest the TPMS system. Unfortunately my passenger side front tire will not "relearn" when letting air out of the tire. I am assuming the sensor is bad, is there anything I can do to besides replacing the sensor?

 

If all you did was rotate the tires, the sensor "should" be good, unless you rotated just as the battery died (otherwise you should have had a TPMS warning before). And, of course, make sure you are letting enough air out for enough time (have compressed air ready)

Only thing I can suggest (and dumb idea) is when you get to the passenger side front, try letting the air out of a different tire to make sure the computer is ok - can't imagine why it wouldn't be, though.

 

Try putting air in, it sometimes won't beep even after letting air in or out for the 8 seconds, just stop putting air out after 8 seconds and wait for the beep, uv seen it take close to half a minute to beep