1. Start the car, make sure the car is in Petrol state.
2. Wait for the original car water temperature to reach 90 degrees and the gas temperature to reach 70 degrees.
3. Press and hold the switch button for 3~5 seconds and then release it. The ECU will be waiting for auto-calibration.
4. After 7~8 minutes, the vehicle will return to Petrol state. The auto-calibration is finished.
5. You can drive the car with gas now.