Well, sorry to bump this topic up yet again, but for those who may want to know...
I couldn't get the sensor to work again after it acted up the second time. I considered pulling the fuse for the leveller, but I figured I may need it at some point. Needless to say, I broke down and got it fixed. It was the sensor all right.
Now for those interested in getting it fixed, here'* the damage:
$156 for the Sensor
$ 69 for Labor
Plus miscellaneous charges and tax, the bill came to $238.48 US.
At least she'* more stable in the turns now.