Why does the car tire still show low pressure after being inflated?
3 Answers
After inflating the car tire, it still indicates insufficient tire pressure because the tire pressure has not been recalibrated. Simply recalibrate the tire pressure on the central control panel. If the tire pressure warning appears some time after inflation but there are no punctures in the tire, it is likely due to air leakage caused by a deformed wheel rim. It is recommended to inspect the wheel rim and replace it if necessary. Precautions for inflating tires: Always use a pressure gauge to check the air pressure to avoid overinflation, which could cause the tire to burst. After stopping the vehicle, wait for the tires to cool down before inflating, as driving increases tire temperature, affecting the pressure. Check the valve stem. If the valve stem and core do not fit smoothly, have protrusions, depressions, or other defects, it will be difficult to inflate and measure the pressure. Pay attention to cleanliness when inflating. The air being pumped in should not contain moisture or oil, as this can deteriorate and damage the inner tube rubber. Do not exceed the standard pressure too much and then release air, nor should you overinflate because you cannot inflate frequently when traveling for long periods. Excessive pressure can overstretch the cords, reducing their strength and affecting the tire's lifespan. Before inflating, clean the dust off the valve stem and ensure the valve core is not loose. After inflating, apply soapy water (or saliva) to the valve stem to check for leaks (small bubbles will form if there is a leak). Also, ensure the valve cap is properly fitted and tightened to prevent dirt from entering the valve. When inflating radial tires, due to their structure, their sinking amount and contact area are larger, often leading to the misconception that they are underinflated, resulting in overinflation. Conversely, because their sinking amount and contact area are naturally larger, they may be mistakenly considered properly inflated even when the pressure is low. Use a standard pressure gauge for accurate measurement. The recommended pressure for radial tires should be 0.5-1.5 kg/cm² higher than that for regular tires. Both the onboard pressure gauge and those used in tire shops should be regularly calibrated to ensure accurate pressure checks.
I've encountered this issue before - the tire pressure warning light stays on even after inflating the tires, which is really frustrating. The main reason is usually that the Tire Pressure Monitoring System (TPMS) wasn't reset promptly. This system requires manual recalibration after inflation to learn the new tire pressure values. If you didn't press the reset button in the vehicle's menu, the system might still be displaying old readings. Another factor could be slow sensor response - sometimes the data transmission takes a few minutes after inflation, so waiting a bit might solve it. I recommend using an accurate pressure gauge to check tire pressure before inflating, ensuring it reaches the standard value before resetting the system. This can prevent many misunderstandings. If the problem persists, it might indicate the sensor battery is running low, requiring replacement at a repair shop. Remember, developing a habit of regular tire checks is crucial to avoid nighttime driving risks. These TPMS issues might seem minor, but timely handling makes life much easier.
I often encounter similar situations when dealing with vehicles. The tire pressure shows low right after inflation, which is usually related to faulty or inaccurate tire pressure sensors. The sensor might be too old, causing inaccurate readings or signal delays. It could also be that the inflation tool itself is imprecise. If you're using a regular air pump but the gauge shows incorrect readings, it's best to switch to a professional tool for testing. Additionally, check if the valve is leaking; a loose cap can also cause pressure drops. I recommend manually measuring the pressure with a tire pressure gauge. If the actual reading is normal but the warning light remains on, it might be a system bug or battery issue. If you're handy, you can check for loose sensor connectors yourself. If you're still unsure, take your car to a shop to read the fault codes for a quick and hassle-free diagnosis. Don't delay—driving with unstable tire pressure is unsafe, especially on highways.
