2009 Buick Enclave - TPMS issue

i have a 2009 enclave suv and the tires are not reading the correct amount of air in the tires.

the tire pressure sensor batteries probably need to be replaced. the whole sensor gets replaced. you can not just replace the batteries.

I really have no idea what you are trying to say . If you have a dash readout of each tires pressure and it does not match what the tire really is then your tire pressure monitors need replaced . If your tires are supposed to something like 32 psi and your tire gauge reads 28 then put air in them.

Or your tire gauge is inaccurate.

Please explain more. What information are you seeing from the TPMS system? How are you measuring the actual pressure?