try this before you do a relearn procedure.
sensors not working
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Try checking them the old fashion way, then put more air if needed. Then see if they work. If there was a problem, I would think that the DIC would tell you. Also, what would be the chances of all four batteries going dead at the same time.
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relearning is not hard to do, but you do need a magnet (like from an old speaker, or one of those nail pick up ones from a home center) to do it. If your battery went dead over the winter, this may fix it.
