As everyone has already said, that is the oil temperature gauge. You can access the coolant temperature in your dash via a “secret menu”. That is where your oil temperature should be at. The coolant temperature and the oil temperature are usually around the same temperature when warmed up. If you oil temperature is low, like around 200°, this may indicate that your coolant thermostat is stuck open. This is a common issue with those engines. Something to keep in mind, not saying your thermostat is broken.
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