I know these are small sensors, but can the batteries be replaced or the complete sensor? And should it be done when changing out the tires?

 

Search engine will tell you more than you want to know.. they are sealed so there is no battery replacement. If you replace at a tire install MAKE SURE they can handle the job correct programming equipment etc. If they can pull the id code from your existing sensor and program a new sensor to it then you won't have to go pay the dealer. Only thing is I don't know if they can still get an ID from a dead sensor.

 

Was driving last Friday and my TPMS light came on for the first time EVER.
Checked the air Saturday, and all 4 were down to 20-22 pounds.
Guess it's the cold weather ... put 32 back in and the light is now happy again .....

 

The tires were way down in pressure before the light came on. The temperature drop was enough to trip at least one sensor.

 

Agreed ...

But, I had last checked and set the pressure in August. Seems odd that all 4 tires would all drop by the same amount.

NOTE TO SELF : Check pressure MONTHLY- these tires are too $$$$ to neglect, besides it is not safe to drive on under-inflated tires .

Here's another interesting tidbit : I also checked the other 3 vehicles :
2002 Chrysler Concorde Limited : all 4 down to 25
1989 Ford Probe LS : all 4 down to 20
1990 GMC Suburban : NO PROBLEM - all 4 still at 32 ( go figure )

 

The low profile tires are much more susceptible to air loss as there is less air in them, even though these tires are wide the volume of air in them is nowhere near the volume in the Suburbans tires say. Loss off 'x' volume of air in the Suburbans tire is nowhere near the percentage loss in the Crossfires with the same loss of air.
I dumped a pressure gage a few weeks ago as the readings were erratic, so use a good gage.
I also noticed that too much hiss when checking the pressure, with an accurate gage, resulted in the loss of .5psi.
These cars are getting old and maybe the valve cores should have been replaced by now. Make sure the caps are on as dirt can enter next time the tires are filled and dirt or ice in the winter can get stuck in the valve, ice in the valve cost me a tire once.

 

Ice in the valve ??? what's that ??? here in Alabama we might get "mud in the tires" ( see movie My Cousin Vinnie ), but never ice in the valve.

 

Hint... After you replace the Tire Presure Sensors with new units...
DO NOT keep the old units in or near the car if you want the warning light to go out...!

 

180...
I installed new tirew pressure sensors... Does Chrysler need to recalibrate/reset...? A computer scan did not show any error codes and see nothing that can be reset...
Ideas...?
I've been using nitrogen and it is better than atmospheric compressed air. but only slightly as dramatic temperature changes can effect the sensitive sensors.
Donnie