Just upgraded my tires to 33s and did it at Mavis tires. They did the sensors aswell as put the tires on... So, when I was on the highway today my tire pressure light started flashing. Checked all my tires and they were at about 35 psi. My buddy said that I prob have to get it recalibrate because the sensors are meant for a stock tire size... Idk, any one know what to do?