Posted on 1/12/2026
Why Is My TPMS Light On? The Real Reasons Your Tire Pressure Monitoring System Activates Modern vehicles rely on complex safety systems designed to protect you long before you sense a problem. One of the most misunderstood of these systems is the TPMS light—the Tire Pressure Monitoring System warning that flashes or illuminates on your dashboard when something is off inside one or more tires. Most drivers see the light come on and assume they’re simply “a little low on air.” But the TPMS system is more than a convenience feature. It is a real-time safety alert designed to prevent tire failure, steering instability, braking issues, and unpredictable handling. In Southern California—especially in Escondido, San Marcos, Vista, Rancho Bernardo, Poway, and the greater North County area—large temperature swings, hot summer pavement, long highway drives, and varying road conditions all influence tire pressure far more than most realize. These environment ... read more