What Causes Tire Pressure to Drop Without a Puncture?

[IsabelLee]

Tire pressure decreases without a puncture primarily due to prolonged exposure to low temperatures, leading to insufficient tire pressure. Direct Tire Pressure Monitoring System (TPMS): This system uses pressure sensors installed in each tire to directly measure tire pressure. The pressure information is transmitted wirelessly from inside the tire to a central receiver module, which then displays the tire pressure data for each tire. The system automatically alerts the driver when tire pressure is too low or when there is a leak. Indirect Tire Pressure Monitoring System (TPMS): This system works by detecting when a tire's pressure drops, causing the vehicle's weight to reduce that tire's rolling radius, which in turn makes it rotate faster than the other wheels. By comparing the rotational speed differences between tires, the system monitors tire pressure. Indirect TPMS essentially relies on calculating the rolling radius of tires to monitor pressure.