If the low tire pressure light has come on inside your car this means you are having a problem with one of your tires. If you see this light, you should get the problem repaired before you drive your car as driving a car with tire problems is dangerous. Below is some more information about this so you can get that annoying light to turn off.
Over Inflated or Under Inflated
The first thing to do is to purchase a pressure gauge at an auto parts store and check the tire pressure. The manual that came with your car will tell you what the pressure should be. If the pressure is not high enough, add some more air to tire. There could also be too much air inside the tire. If so, release some air until the pressure reads the correct number. Start your car up and the low tire pressure light should be off. If the air pressure gets low again after only a few days, then you have a slow leak in one or more of your tires and you should get the tires replaced.
Low Tire Pressure Comes Back On
If the low tire pressure comes back on again and the air pressure is correct in your tires, there is likely a problem with the tire air pressure monitoring system (TPMS). This system monitors the tires to ensure they are properly inflated.
Your car may have a direct monitoring system or an indirect monitoring system. A direct system uses sensors to constantly monitor the air pressure in the tires. It gathers data and sends this data to a control module. If the data is incorrect the light will come on.
An indirect TPMS uses wheel sensors in the anti-lock braking system. The sensors determine how fast your tires move as you are driving to determine the size of your tires. If your wheel spins faster than normal, the indirect TPMS determines there is a tire that is underinflated and the light will come on.
If the tire pressure warning light constantly comes back or will not go off, there is likely a problem with the TPMS. This could be that one of the wheels has a bad sensor or there could be a problem with the system itself.
Contact a tire company like Bob's Tire Service if you have questions about this and they can explain it to you in more detail.