Most tire pressure sensor batteries last approx. 6 or 7 years and they are not serviceable. Finding out what the code is well tell if it is a "low battery" code. If it is, the most practical thing to do for the long run is replace all four TPMS sensors and then have them initialized by a Nissan/Infiniti dealer or a tire shop that has the equipment to do so. Nissan TPMS sensors usually run around $70-80 each. Rockauto.com sells Dorman TPMS sensors for $50 each.
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