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 does temperature affect tire pressure?
Ambient temperature has a direct and noticeable effect on tire pressure due to the principles of gas expansion and contraction. As temperatures drop, the air inside your tires compresses, causing the pressure to decrease. Conversely, as temperatures rise, the air expands, increasing tire pressure. A general rule of thumb is that for every 10 degrees Fahrenheit change in ambient temperature, tire pressure will change by approximately 1 PSI. This is why it's essential to check tire pressure regularly, especially during seasonal changes, and inflate tires to the recommended pressure when they are cold.