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Owns A Torsen
Joined: Mon Sep 18th, 2017
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The thermostat could be stuck closed and the system was never purged of air because of that.
As Tony said, the gauge hardly ever goes bad except for an occasional needle falling completely off.
I don't have a manual but I'm pretty sure that 3.0 has 2 water temp sensors. One for the computer and one for the gauge. If your OBD scanner can see water temp and it is rising it might just be the sending unit to the gauge which would cause the light to come on.
The sending unit for the gauge only has 1 wire and the one for the computer has 2. Should be easy to figure out which one it is I think I would replace it regardless.
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01 XLT 2WD RC Steppie 3.0 auto Silver
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