Polo will downshift after cleaning the throttle and slightly stepping on it.

The sensor is damaged. After cleaning the polo, some water will enter the sensor of the throttle valve, which will cause the sensor to malfunction and cause the sensor to send a wrong signal to the system when stepping on the throttle, thus causing the computer system to mistakenly downshift the gearbox of the vehicle. In this case, it is necessary to go to the 4s shop for maintenance in time.