My TPMS light has never been on, but my (!) light was on for a few months last winter. When I went in for an oil change this spring the dealer hooked it up to diagnostics and it said my tires had 99psi! It was obviously an error so they reset it and I had no warning lights all summer until just yesterday when the temp dropped. But I know for a fact that I can still turn off my VSA while the (!) light is on. And the manual specifically states that VSA is always on if the TPMS light is on.
Anyhow, back to NITROGEN. Anyone using it? From what I've read it is less affected by temperature changes. Meaning your tire pressure should stay pretty constant year round.
So you're telling me that my 4 months of going to the track and doing burnouts with the TPMS light on is all in my head?
You may be right about being able to turn it on/off with the (!) light, but I am, again, 110% positive about the TPMS indicator and VSA.
"And the manual specifically states that VSA is always on if the TPMS light is on"
... which is true. It does say that.
But you also say this
"But I know for a fact that I can still turn off my VSA while the (!) light is on"
... now. Lets look at what the manual says.
This is straight letter for letter from the manual (page 218)...
If the low tire pressure indicator or TPMS indicator comes on, the VSA system automatically turns on even if the VSA system is turned off by pressing the VSA OFF switch (see page 217). If this happens, you cannot turn the VSA system off by pressing the VSA off switch again
So, by reading this and taking it as the absolute truth, then even what you claim (about the (!) being on and disabling VSA and doing burnouts) would go against what the manual says.
So... do you trust the manual or your own personal experience?