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Initial SetupOur controller module must be calibrated for proper use. This is called sensor heater calibration, and it should be performed every time there is a new sensor connected to the controller. In our case it is a new setup, so we had to unscrew the O2 sensor from the bung. This exposes the O2 sensor to free air. Following the instructions, we performed these steps.1. Leave the sensor disconnected from the controller.2. Turn on the ignition; power on the controller for 20 seconds.3. Turn off the ignition; power off the controller for 20 seconds.4. Connect the sensor to the controller (while sensor is exposed to air, not in the exhaust system).5. Turn on the ignition; keep the controller power on for at least two minutes.