Posted on 6/27/2025
Seeing your tire pressure warning light come on is frustrating, especially after you’ve already topped off the tires. You expect the warning to disappear, but it stays on, leaving you wondering whether it’s safe to keep driving or if something else is going on. This is a common issue drivers face, and there are several reasons your tire pressure monitoring system (TPMS) may still be alerting you after you’ve added air. Understanding how the system works and what causes it to stay lit will help you fix the problem and avoid unnecessary stress. How the Tire Pressure Monitoring System Works The TPMS is designed to alert you when one or more of your tires are underinflated. It relies on sensors inside the tire or on the valve stem that monitor the air pressure and send data to your car’s onboard computer. When pressure drops below a safe threshold, usually 25% below the manufacturer’s recommendation, the light on your dashboard comes on. T ... read more