has anyone noticed any problems with the tire pressure sensors? mine have been reading in the 36-38 range, which i verify on a weekly basis with a very accurate tire gauge that i have. all of a sudden, in the last couple of weeks, the dic is showing as low as 32 psi when cold, but it does go up to 35-38 after a few highway miles. even when cold, the dic has not shown such a low psi since i started monitoring tire pressures weekly back in April. my gauge is still showing 37-38 psi. the air temp here in texas is only about 10 degrees cooler (70 at night, 90 daytime) than during mid-summer, so it's not temperature related. now, i don't mind a psi or two difference, but when i see 32 psi on the dic i get nervous as to whether my tires are low, or not.