The document provides diagnostic trouble codes (DTCs), applicable component IDs, test IDs, test values, and test limits for various vehicle systems including the catalyst, EVAP control system, oxygen sensors, EGR system, and more. Specified DTCs include P0420, P0440, P1440, P1447, P0133, P0131, and others. Corresponding test values and limits are listed to determine if a diagnostic test for the associated system or circuit passes or fails. Applicable units for the test values such as milliseconds, voltage, temperature, and other parameters are also provided.