Is 4.3 V enough to power abs sensors?

[Nostalgic]

All of my experience is with auto/light truck, but I've had them static test out ok, but when test driving with scan tool hooked up, you could watch it go erratic and drop out (dead open or dead ground). You can hook up a multimeter to it and spin the wheel, but it's next to impossible to make a solid conclusion off of that alone. How much are the sensors? In some cases it's easier to just be a parts swapper. Worst case, you'll have a spare.