Steady vs. flashing
Steady means low pressure. Flashing for about a minute and then staying on indicates a TPMS system or sensor problem.
Temperature changes
Tire pressure drops roughly 1 PSI per 10°F drop. Texas cold fronts commonly trigger the light overnight.
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Slow leaks
Nails, bead leaks, and corroded valve stems can lose a few PSI per week.
Sensor batteries
TPMS sensors have batteries that typically last 5–10 years and can't be replaced separately.
Frequently asked questions
Where do I find the correct tire pressure?
On the sticker inside the driver's door jamb, not the tire sidewall.
Will the light reset itself?
On most cars it resets after driving a few miles at the correct pressure.