Why doesn't a tire pressure of 1.9 trigger an alarm?

[LilyDella]

A tire pressure of 1.9 not triggering an alarm is because the minimum tire pressure alarm threshold varies for each vehicle model. This is mainly related to the settings of each vehicle's onboard computer. Generally, the low-pressure alarm threshold for most vehicles is set at 1.9. Hazards of excessively low or high tire pressure: Both underinflation and overinflation can shorten tire lifespan. Underinflation increases tire deformation, making the sidewalls prone to cracking. It also causes excessive flexing, leading to overheating, accelerated rubber aging, and even blowouts. It enlarges the tire's contact area with the road, accelerating shoulder wear. Overinflation causes excessive tire expansion and reduced elasticity, increasing the risk of blowouts upon significant impact. It also leads to rapid tread wear. Functions of tire pressure monitoring alarms: Prevent blowouts by monitoring tire pressure and temperature in real time, addressing issues before they occur. Save fuel by maintaining correct tire pressure, reducing vehicle fuel consumption. Reduce wear – insufficient pressure causes excessive wear (tire scrubbing) and shortens tire lifespan.