Next, Insert the key into the ignition and twist it to the first stage (do not start). This is necessary as the device needs to be reset and calibrated first. In case of a push button start car, just press the starter button once without pressing the brake pedal.Effuel and hold the reset button on the EcoOBD2 device for 5 seconds. After that, wait for around a minute before doing anything.Just drive casually and use the car like you normally would. The EcoOBD2 device will automatically detect your driving style and will take around 150 miles to adjust perfectly for maximum efficiency.Click Here