Temperature sensors are two wired (not polarity sensitive):
•Available AIN (temperature) on MaxxECU.
Note: Internal pullup on MaxxECU AINx (temperature) is 2k5 ohm)
0-5v sensors (pressure etc) do have three wires that needs to be connected:
•+5V sensor supply.
•Analog output signal (0-5V signal).
•Sensor GND (must NOT be connected to engine or chassie ground).
see, connector pinouts.
Increase the filter value to add filters if the value fluctuates to much.