I would not worry about 207. As for the location of your sender, it must be located in the loop of the engine that circulates when the thermostat is closed.
I'm not familiar with the engine you have but typically coolant circulates through the head and heater core and sometimes a portion of the block before the thermostat opens. Once open obviously it flows to the radiator and back usually to the block.
You need your sender to be part of that loop otherwise it's just reading the water headed to the radiator once the thermostat opens.
Hope that helps,
Mike
I'm not familiar with the engine you have but typically coolant circulates through the head and heater core and sometimes a portion of the block before the thermostat opens. Once open obviously it flows to the radiator and back usually to the block.
You need your sender to be part of that loop otherwise it's just reading the water headed to the radiator once the thermostat opens.
Hope that helps,
Mike