ive been having problems with my tpm's.. I live in the northeast and since it started to get real cold my tire pressure light came on.. its saying that some tires are as low as 20 and others in the low 30's but they indeed have the correct pressure (32 front/30 rear).. when im driving i monitor the computer and they move up and down as i drive..my question is do they need to be reset by the dealer ??

 

You may have a sensor going bad - happened with my '08 TSX @ 24000 miles. Dealer will need to diagnose.

 

Just a thought, but I think there's a "tire calibrate" in the diagnostic menu (hold down MENU, CANCEL and MAP). If it works like my wife's Lexus, you can "reset" the TPM once you are certain normal tire pressure is present.