There are two sensors on my B200F.
Quite some time ago I was surprised when an older guy, but not quite as old as me, who had worked on 940s when they were new advised me that they had two engine coolant temperature sensors. One talks to the instrument panel engine temp. gauge and the other talks to the ECU.
On my B200F they are located on the left side of the engine under the induction mankfold. IIRC the one for the ECU is the one towards the rear of the engine and is the most difficult to access.
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