Press [OK] to confirm. The following screen will appear: DIAGNOSTIC MENU 4.1 Read Codes This option identifies which section of the emission control system has malfunctioned. Select [Read Codes] and press [OK]. The scanner will automatically read the SAE-standard DTCs and the following screen will appear: *Note: Never replace a part based only on the DTC definition. Always refer to the vehicle’s service manual for detailed testing instructions. If the code is defined by the vehicle’s manufacturer, the following screen will appear: 12