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Mine went on at 28 PSI as well. I inflated them all up to 35 and the light went away without requiring driving. Check your tire pressure gauge as well, it may no longer be calibrated correctly and is actually reading lower than actual. My compressor has a digital gauge which was about 5 PSI off, so even after I had brought them all up to 32 the light wouldn't go off, then I got my analog gauge and saw that I was still low on one of the tires. Took them all up to 35 on the analog since the temperature's are still dropping here.
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