Why does the tire pressure alarm not trigger after reset?
2 Answers
Tire pressure alarm not triggering after reset is likely due to a faulty tire sensor that needs replacement. Under normal circumstances, it's unlikely for all four tires to have abnormal pressure simultaneously. This issue may stem from the tire pressure system or tire pressure sensors, and it is recommended to have it checked at a 4S shop. Abnormal tire pressure can occur for the following reasons: Abnormal tire pressure: Generally, the alarm will trigger if the pressure is below 1.8 bar or above 3.0 bar. In such cases, tire inspection and pressure adjustment are necessary. Tire pressure monitoring not reset: After inflating the tires, if the tire pressure monitoring system is not reset promptly, it will continue to record the previous data, causing the tire pressure monitoring indicator to light up. Simply performing a tire pressure reset will resolve this issue. Damaged tire pressure sensor: The tire pressure sensor, which monitors tire pressure, is directly installed inside the tire and connected to the tire inflation valve. If the sensor is damaged during driving, it can cause the tire pressure warning light to illuminate. For sensor damage, the only solution is to replace it with a new component.
The tire pressure warning light stopped alarming after reset, which I've experienced before. Last time it happened when my car reached 5 years old. After reset, if the light doesn't come on, either the tire pressure has returned to normal or there's an issue with the sensor. The battery life of TPMS sensors is typically 5-7 years - they may have automatically shut down due to depleted battery. Incomplete reset is another common reason; some models require driving a few kilometers for recalibration after reset - I once had to drive on the highway before it worked again. If the sensor is broken, it won't send signals to the system, so the warning light naturally won't illuminate. I recommend manually checking each tire's pressure with a gauge. If all readings are normal, monitor for a few days. If the issue persists, have a professional shop scan the sensor status with a diagnostic tool. Never ignore safety risks - underinflated tires are extremely dangerous. The solution is simple but must be addressed promptly.
