Tire inflation warning light !

Just check the pressures to make sure. Some wheels actually leak air, my 17-inch OEM Persona wheel is one of them. So, it's not just aftermarket. Also, the bead (the seam between the wheel and the tire) can leak. Your tire shop can work on it, including buffing out the wheel and even putting a sealant along the bead to help seal it. I've had this too, on a BMW.

 

Try the reset button procedure too. Maybe the values it's set to are too high? Couldn't hurt, anyway.

Last summer, on a road trip, the light went on for us. I pulled into a gas station, checked: none were low. Just for the heck of it I bumped them all about 4 pounds. Light went off, and stayed off some weeks later, when I adjusted them back down. Something buggy?

 

You can use miniVCI and Techstream to read the tire pressures. As you may know the TPMS batteries can go bad but they are lasting ~10 years on our 2006. Someone said the touring wheels may be hatrder on the TPMS.

 

Try dropping the tires to back to the sill plate pressures, reset the TPMS system, and then raise your pressures again. Sometimes I have to drive for at least 30 minutes to get the light to go off.

Has anyone actually documented the batteries dying on the in-wheel sensors?

 

...older cars 2006/2007 TPMS batts are failing for sure...is that what you meant?
They are supposed to last 5-7 years but I went 9,5 years before one went bad,
2006 is the first model year so its just starting to happen more often.

 

Yes, I've got a 2009 and was wondering how long they have. Sensors do go bad at some rate, just haven't heard a lot of chatter on here about the internal batteries going bad (yet) but know they have to go sometime. I guess the only remedy is replacement of the entire TPMS sending unit on the inside of the tire, since the batteries don't seem to be replaceable. Maybe someone will start rebuilding them? Since 2006 was pretty much the Federal legislation that made them standard, the wave might turn into a tsunami.

 

Yes we are getting increased posts...see my thread under Gen2 - Management of TPMS with Techstream.
You can get OEM unit about $37 on Amazon (per tire), then you gotta replace the one in the tire. Or just screw it and live with the warning light. There are cheaper than OEM too.

Best idea if you wanna keep 'em is try to replace during tire replacement once you get to the 7-8 year mark. But I was clueless until it went bad on me.