your thinking its '2', maybe its '22'. water temp sensor signal. no idea what that could mean...use that link the guy above me gave you, then go to the TSRM in that post and browse around.
as long as you know its working, it should be fine...however, gauges == really important, so keep looking around.
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my car:
1987 brownish Toyota Supra Turbo, automatic 7MGTE engine with ~100k miles on it.
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