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Originally Posted by itboyep
i have a similar problem. I recently bought the car and noticed that it needs air. checked air pressure on the tire on a couple of them i got 45 psi, 35 on another and 22 on the front driver's. the light came on after i have made adjustment to the tire pressure to reflect approx. 30 psi recommendation posted on the door. My 15" Tire however states 35 psi is recommended. What is the correct tire pressure and is there anything else we can look into to remove the low tire pressure light on the dash?
thanks,
-ep
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Your car doesn't actually measure tire pressure. It measures the rpm of the wheels. If you have a low tire the rpm from the wheel speed sensor will be different than the other tires and you will get a light on the dash. True tire pressure monitors (TPMS's) became mandatory on 2008 vehicles. They are in the wheel and part of the stem and transmit pressure to the receiver module in the car via an RF signal.
Set the tire pressure with the car cold, reset the dash light per instructions in your manual. Over inflation will give you a hard ride, will wear in the center and is more susceptible to road damage. Under inflation will cause wear on the outer edges and a mushy noisy ride. In both cases handling will be affected as will traction.