Need help with adding a E3D PT 1000 Temperature sensor to a TAZ 5

I am upgrading my TAZ 5 with a Titan Aero Volcano toolhead into a high temperature toolhead. I already added a 65 watt heater and a PT 1000 Sensor. While it was idling, the sensor said that the hotend was at 150 Celcius even though it was at room temperature. I assume that I will need to alter the firmware. What do I need to do?

Looks like this thread may help you.