A steady tire pressure warning light usually means one or more tires are underinflated, while a flashing light often indicates a system malfunction or a sensor issue.
When your tire pressure monitoring system (TPMS) light illuminates, it's important to assess the situation promptly. A steady light suggests you should immediately check your tire inflation levels and add air if necessary. If the light continues to stay on after inflating the tires to the recommended pressure, or if it flashes, it could signal a problem with the TPMS sensors themselves or another component of the system. Driving with underinflated tires can lead to poor handling, increased fuel consumption, and accelerated tire wear. A flashing light, in particular, warrants a closer inspection by a professional to diagnose the specific issue.
This information is for general guidance; always consult your vehicle's owner's manual and a qualified mechanic for specific diagnoses and repairs.
How do I know if my TPMS sensor needs replacement?
You may need to replace a TPMS sensor if the TPMS warning light flashes upon starting your vehicle and then remains illuminated, indicating a system fault rather than low pressure. Other signs can include intermittent warnings or the light not illuminating at all when it should. Sensors have batteries that eventually die, typically after 5-10 years of use, or they can become damaged by road debris or corrosion. A professional diagnostic scan is usually required to identify which specific sensor is malfunctioning, as they are designed to be sealed units and are not typically user-serviceable.