I'm glad you brought this up.
I'm glad you brought this up. One thing to keep in mind is this scenario. A person with the TPMS light goes to a dealer. The dealer inspects the 4 sensors, clears the codes, and then inputs the correct pressure using nitrogen. That solves the person's problem and for $40 or so the customer is psyched. However, had that same service been conducted using shop CDA (clean dry air) what would the result have been? Remember, cars in the US market come with air in the tires and are under warranty. They work just fine. A large percentage of these customers may have been fine with had the proper amount of air been input when the tires were cold
Not sure what you mean by :They never saw the temperature fluctuations after using nitrogen." I assume you mean the problem never came back. It shouldn't come back either way.
Thanks for commenting.