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Had similar situation today. Car has about 800 miles, highway driving to get to magical 1500, and TPMS system flashed on dash with active "TPMS requires service and inactive" or something like that. Dash light flashed for 1 min, then on steady.
1) tire temp still worked- showed green/normal
2) tire pressure blank
3) about 20 min later, reset and all normal...
4) restarted car, still working
5) manual states radio frequencies could cause conflict
Car is 100% stock and nothing other than iPhone plugged in.
So off to check for lose connections.
Really weird.
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