I just had tire pressure at 37 psi on all four tires. Soon afterwards, the tire meter on my dashboard is telling me all four tires have different psi. One has 40 the other 38, 39, 35, is this normal?
Many times the TPMS is not as accurate as a tire pressure gauge. Use a tire pressure gauge to set the tire pressure cold and monitor the TPMS system to detect a low or deflated tire.
You have a 2015, so surely you are under warranty? Take it to your dealer and complain, the squeaky wheel gets the grease! BTW, I've yet to find a car where all tire pressure gauges work 100% accurately, I always rely on a manual pressure gauge.
Ken, my Corvette is shockingly close on TPMS versus tire gauge.
It is normal for tire pressure to increase in the tires as you drive and the tires heat up. 1 or 2 psi difference between the tires is normal depending on which tires slip when you're accelerating or turning. Verify the tire pressure with an external gauge.
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