The tire-pressure monitoring system warning usually means one or more tires is significantly underinflated, though the exact message and behavior differ by vehicle.
Check pressure correctly
Use a reliable gauge and the vehicle’s recommended cold pressure from the driver-door placard or owner’s manual—not the maximum pressure printed on the tire sidewall.
Look for damage
Inspect for a visibly low tire, puncture, or damage. Do not drive on a flat tire.
After adjustment
Some vehicles require driving or a TPMS reset procedure after correcting pressures. Follow the manual for the specific reset process.