2008 Challenger 180 SE - Engine Code P0544 Exhaust Gas Temperature Sensor

[dclawrence]

Boat has 300 hours, yesterday at full throttle this error code popped up display. Thinking of checking the connection for corrosion however can't find where the sensor connects to the exhaust. I'm new, just bought the boat. Can someone assist ? Any other troubleshooting I should do ?
thanks everyone.