Why does the tire pressure suddenly become abnormal?
3 Answers
Tire pressure abnormalities generally have the following 3 reasons: Abnormal tire pressure: Generally, if it is below 1.8bar or exceeds 3.0bar, the system will trigger an alarm. At this point, tire inspection and pressure adjustment are required. Tire pressure monitoring not reset: After inflating the tires, if the tire pressure is not reset in time, the tire pressure monitoring system will still record the previous data, causing the tire pressure monitoring indicator to light up. In this case, simply perform a tire pressure reset. Damaged tire pressure sensor: The tire pressure sensor is used to monitor tire pressure and is directly installed inside the tire, connected to the tire inflation valve. If the tire pressure sensor is damaged due to impact while driving, it can also cause the tire pressure warning light to illuminate. For sensor damage issues, the only solution is to replace it with a new component. Tire pressure reset: Tire pressure reset is the operation of resetting the tire pressure monitoring system after addressing the tire pressure issue. Tire pressure reset method: First, turn on the ignition switch, then press and hold the tire pressure monitoring reset button. After hearing a "beep" sound, release the button. The tire pressure monitoring system will then store the current normal tire pressure data, automatically clear the previous data, and finally, the warning light on the dashboard will turn off, indicating the completion of the tire pressure reset.
I've encountered sudden abnormal tire pressure several times, usually during daily commutes when the dashboard warning light suddenly comes on, giving me a scare. The most common cause is a puncture from nails or sharp stones on the road, leading to rapid air loss. Another possibility is a loose or aging valve core or valve cap, resulting in slow leaks where air gradually escapes, causing a noticeable drop in pressure. Weather changes also have a big impact—for example, tire pressure drops significantly in cold weather, or rises due to heat expansion during long drives. Additionally, sidewall cracks or corroded rims compromising the seal can pose risks. Abnormal tire pressure not only increases fuel consumption but also affects braking performance and tire lifespan, even risking a blowout. I make it a habit to check my tires monthly with a simple pressure gauge when they're cold, maintaining the manufacturer-recommended value, such as around 35 psi, which gives me peace of mind during daily driving. If a warning suddenly appears, I recommend pulling over safely and manually checking the pressure to confirm if there's an actual leak before taking action. Developing a routine inspection habit can save a lot of trouble from roadside breakdowns.
As someone who often helps friends with car repairs, I know that sudden changes in tire pressure can involve several points. The primary concern is physical damage to the tire, such as running over a nail or glass piercing the inner tube, causing rapid air leakage. Secondly, aging valve components, such as a worn valve core, can lead to chronic air loss. Temperature effects should not be overlooked either, as extreme temperature differences can cause air to expand and contract, leading to pressure fluctuations. Sensor issues are more noticeable in newer vehicles, where the tire pressure monitoring system might falsely report faults, especially when the battery is weak or the wiring is damp, triggering incorrect alarms. Other factors like overheating tires during long-distance driving or rim deformation causing air leaks should also be checked. Regular maintenance is crucial. It's recommended to check tire pressure quarterly, clean around the valve to remove dirt, and maintain standard pressure values to optimize tire grip and fuel efficiency. If the warning light comes on, stop safely immediately to inspect and avoid driving risks.
