TPMS Light Flashing / On After New Tires
Last weekend I had new tires put on the Armada. A couple of days after, the TPMS light came on. When you first start the truck, the light flashes, indicating a fault in the system. After a minute of so, the light stops flashing, and stays on steady. My truck has the Navigation system, so I can see the individual tire pressures on the screen. Only three of the pressures are showing, the fourth shows "**". So, I went back to the tire dealer (America's Tire), and they tested all four sensors with a hand-held device; he was able to communicate with all four sensors. He said that the batteries inside the sensor have a life of about 6 to 8 years, and that although he was able to communicate with the sensors, a weak battery on one of them might be causing the problem. He recommended replacing all four of the sensors, under the theory that if one was going bad, the other three weren't far behind. He wants $60 each, plus $10 each for installation (re-balancing the tire is free, since I bought the tires from them). Does this explanation sound reasonable? Anything else I should be checking?
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