![]() ![]() The light may shut off on its own after you drive 20 minutes or so, as the air in your tires warms and expands and proper inflation level stabilizes. Large swings in temperature between day and night can affect the pressure in your tires by up to 10 PSI. This can cause the low-pressure indicator to appear. Temperature changes overnight or from cold winter days can affect your tire pressure. No matter what causes your tire pressure light to turn on, come into any Les Schwab to have air added to your tires and get your system checked out. If your vehicle does not have a TPMS light, the low-pressure icon might flash, which could indicate an issue with the system. The TPMS light, available in some vehicles, may light up indicating an issue with the tire pressure monitoring system, such as a dead battery in one of the tire-pressure sensors. This lights up when the pressure in one or more of your tires is low. ![]() The low-pressure indicator looks like an exclamation point in the middle of an open-top, flat tire. The tire pressure light (or low-pressure indicator) is just one part of the TPMS system. Whenever your TPMS light comes on, have your air checked and bring your tires up to the proper pressure. This is what triggers the sensing transmitters inside your tires to illuminate your TPMS dash light. These two factors combined can cause the air pressure in a tire to go 25 percent below the recommended fill pressure. Tires also lose about 1 PSI per month just from seepage of air around the edge of the rim and through the tread itself. This is temporary because driving will heat up the tire and increase the tire’s pressure. It’s not due to air escaping, but rather the air inside the tire condenses, taking up less space when it's cold. Tire pressure can decrease about 1 PSI (pounds per square inch) for every 10 degrees the temperature drops. That’s because cold air can affect the air pressure in your tires. If your TPMS (tire pressure monitoring system) warning light goes on during a cold snap, it may not mean your tire has a leak. ![]() TPMS Light Coming On in Cold Weather? Here’s Why ![]()
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