Hi pakwheelers, I have 2007 vitz 1,3 fl 2szfe,I recently change its oil ,coolant,air filter,planning to change its transmission oil,the only problem is vitz engine noise from 0 to 40 ,car is running smooth over 40, do i need to clean sensors and throttle body or leave as it is,thinking about ac and brake service too,I heard that its better to avoid vitz sensors cleaning if not giving any problem because its complicated,any suggestions ,thank you