I have just bought Toyota Passo 2017 Package XLS and has mileage counter around 47,000 KM. There is a vibration in cabin (on dashboard, steering) start when speed limit above or at 20 Km/h and throttle pressed at low RPM, also car not running smoothly in this situation like it is suffocating something.
All services of full tuning had been done including CAT cleaning, Fuel Injectors, Fuel Pump, Plugs, Air Filter, O2 Sensors. I am using engine oil Mobil 5w-30. I am using High Octane since I have bought the car but unfortunately vibration still persist.
Also I have changed tires and alloy rims.
What I have noticed that, if I give throttle hard this vibration gone but at high speed.