Depends on the vehicle and tire size. -Check at your tire store, this is not something you should guess.
At least once a week.
Perhaps you should try checking your tire pressure and reinflating them to the recommended pressure.
I check mine every other day, and keep a good tire gauge in each car.
You should check the air pressure at least once a month.You should check the air pressure at least once a month.
Check the inside of the front drivers door frame the tire pressure should be on a sticker there
check the driver door, driver door frame, or inside the gas fill cap for a label telling you what your tire pressure should be.
there should be a sticker on the door jam of your car (if not check the manual) of what the manufacturer recommended tire pressure.
Check the label on the drivers door jamb. That has the recommended pressure.
The tire sidewall will list the max pressure. Check the owners manual or the driver door jamb sticker for the correct pressure for the vehicle
Yes. The light means that one of the tires is not reading correctly. Either from improper pressure or a sensor problem.
I check the tire air pressure in all the tires including the spare every oil change or before a long trip.