A ballpark estimate is that you will lose about 1 PSI for each 10F drop in ambient temperature. You should check when the car has been sitting for some time, say in the morning. If you travel from an area where the overnight temperatures are typically 80F to an area where they are typically 30F then you may see about a 5 PSI drop. This may very well trigger the TPMS.
Quote:
Originally Posted by justjim
Every time I go north to a cold climate the light comes on for low tire pressure.
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