Had 20' tires and put the original stock 18' back with new tires,balance and alignment and now the tire pressure system fault light keeps coming on

There Are Cars That Require New Air Pressure Sensors When Replacing Tires. Wal-Mart Does Not Offer That Service. Just Tires, Tires Plus Etc Can Help You

those lo profile tire 42lbs that the max air pressure you can put in 30 to 35lbs has long as the 4 tire got the same pressure thanks for the post Pierre

Hi,If your Hyundia is at least a 2007 or above it most likely has a TPMS(Tire Pressure Monitoring System) and a low tire lite on the dash. The spare tires don't have a TPMS sensor in them. Have your original tire repaired of the flat,when you put the stock wheel and tire back on the car at a proper inflation of at least 32-35psi, the low tire pressure lite should go out soon after.

There is a special tool needed to reset the TPMS on your vehicle. The Firestone store may not have it, but your local Chrysler dealer will. I hate to refer folks to dealerships for seemingly simple problems but in this case I personally know of no other option.

The tire sensors are on the base of the valve stems of the original wheels. Do your new tires/wheels have TPMS valve stems?

Unless you buy wheels with TPMS (tire pressure monitoring system) sensors in them, or put your old wheels back on, the system won't work.

The noise is most likely caused by the different wear pattern on the tire that came from the rear of the car. The difference in the alignment between the front and rear suspension systems causes the tires to wear accordingly. It will take some time for the tires to wear in to their new environment. The noise should go away gradually. You should also check your tire pressure to make sure you don't have an improperly inflated tire.

Maybe when you change the tires they remove or broke one or the four sensors located inside the rim or wheel, at the inside of the valve, this sensors transmit the low pressure to the computer, and if one, or all, are removed or damaged, computer will register it at as a low pressure tire

Some tire pressure monitoring systems don't care if the wheels were put back on in the same position they were in originally.Unfortunately I think Subaru's do.If the light hasn't turned within a few miles of driving you will need to have your monitoring system reset.Most tire shops have the needed scanners but if they don't,do you Have a Discount Tire in your area? The last I heard they do this for free.Good Luck!

there are several things, tire balance, tire pressure and alignment, check and make sure your tire pressure is correct, have the tires balanced, and get a front end alignment, this should resolve your issue, Good Luck!

alignment is not right. take it back tell them the problem.