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Tyre puncture on my Magnite & weird TPMS behaviour

In my case, the error should have been for the front left tire because it had puncture so it would have had more traction due to reduced pressure and would probably be rotating slower.

BHPian vamsi.vadrevu recently shared this with other enthusiasts:

Today morning (to my absolute horror) I found my front left tire completely deflated. The tire was basically flat against the parking surface!

Yesterday I had gone to a nearby foam wash place and after the wash, while returning, I saw the dashboard had thrown the "check tire pressure error" for rear left tire. I immediately stopped and checked the rear tire's pressure and found it exactly 36.4 PSI (using etenwolf calibrated tire pressure gauge). I thought that the pressure water washing must've fouled up the ABS sensor and so the computer is reading it wrongly. I didn't think much of it and decided that I'd check it out today after the water would have dried off.

But today, when I saw the front left tyre completely deflated, I thought, perhaps the deflation warning system had wrongly identified the issue as rear tire instead of the front tire. Has anyone faced this issue before?

Incidentally, about 10 months ago, that rear right tire had indeed had a puncture and the computer correctly identified that deflation. But it was a slow leak and was identified and fixed immediately and it hasn't leaked since. And since that time, I've rotated my tires twice so I don't even remember where that originally punctured tire sits now!

Anyway, I immediately re-inflated my tire with the tire inflator and plugged the puncture after removing the nail. There was a 3 inch nail deeply embedded in the middle of the tread with its head inside the tire and the pointy end facing out!

It was a very back breaking task removing the tire and removing the nail with pliers and thereafter inserting the plug. The insertion tool bent multiple times and I had to restra But I think I did a decent job because it hasn't leaked since I plugged it.

I took 2 long drives and the pressure is holding. The computer hasn't thrown any errors now. All errors cleared automatically.

Now, the lingering questions I have from this experience are;

1. Would there have been any lasting damage to the tire's side wall or the alloy rim from the car sitting on the fully deflated tire (basically, the rim touching the tire - which was touching the parking surface!)
2. How exactly does the deflation warning system calculate if there's a deflation? I thought that the computer reads the ABS sensors inputs and sees if there's abnormal rotation speed on a single tire against all the others and it throws error for that specific tyre. In my case, the error should have been for the front left tire because it had puncture so it would have had more traction due to reduced pressure and would probably be rotating slower. But the computer threw the error for rear left tire. Did anyone face this issue ever before?

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