Using San Tester (VAG 1551)
Enter self-diagnostics. See ENTERING SELF-DIAGNOSTICS. Select function 02, READ DTC MEMORY. Number of codes set in memory (if any) will be displayed, or NO CODE RECOGNIZED will be displayed. If printer is turned on, stored codes will be displayed and printed. If printer is turned off, press right arrow button to advance to next code until all codes have been displayed.