comments:
For the most part TPS updates while the car is moving (Like my 24 Mitsubishi outlander). Now my 16 explorer would update as you add air. It just depends. You should never sole rely on that system. It can be faulty as hell, as you have now experienced. You need a good tire pressure gauge https://www.amazon.com/dp/B0BY2GD9VCIt's on sale right now for $5.99, I have it myself. It's spot on, worth every penny. Don't go buy just any gauge either. You get what you pay for, sometimes you don't (Buy expensive thinking it's good bc of price, but it's shit). The guys on this sub know their shit. If they say you ran it flat, It was run flat, end of story. I hate this happened, I truly do. Like you mentioned, it could be a defect. Your best bet is to take it back to the place you got it from, with your fingers crossed hoping they will work with you. Moral of the story. Don't rely solely on the TPS to let you know you need air or have too much. It can be unreliable and a false sense of security. Buy a quality Tire pressure gauge, not a cheap one at the check-out counter. If offered by the seller, get road hazard protection (usually a percentage of the market value per tire. 20% isn't unheard of, worth every penny). I hope you get everything worked out, and you go on to have a great life. Best of luck -Rockuharddd
Buy a calibrated and certified digital one, they aren't even that expensive. It's like under $20 on amazon. Mine is good for +-0.5% up to 200psi and cost $8. Project farm on YouTube has a video testing a bunch of them. Here's the one I have, also one that project farm has tested and it does infact read with an accuracy of +-0.5%. https://a.co/d/0214Hmca