Originally Posted by tom2112
How long has the light been on? I've noticed that when I lower my pressure for racing it takes a while to come on. Then I put them back to standard pressure to go home from the races, the light takes a while to turn off.
The sensor the mechanic is talking about is the TPMS sensor. It is a squarish device mounted inside your wheel. I believe they are connected to the valve stem on the inside of the wheel (you can't see them without removing the tire). But don't quote me on that.
A new sensor shouldn't be expensive. Tire rack only charges about $35 for a new sensor, so don't let the stealership rob you for a big chunk of change to replace it.
WOW! I was quoted $117 per sensor from my dealer. I just called TireRack and "Jason" told me $32 each. Guaranteed to work with our cars.
That's the way to go.
But, if you haven't already done this, the dealer should "talk" to each of the sensors you have installed and determine if one is actually bad.