I don't believe that's possible as the issue - the temp sender tells the TCU that operating temperature has not been reached. When that happens, the TCU won't command the lockup solenoid.

However, it won't be represented as an error code as the lockup won't even be asked for.

I think that my trip into the drink may have affected the TCU - I suspect it didnt like being watered.

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1999 Montero Gen 2.5