April 5, 2026: LEMON Manuals is launched! Read the announcement.

Catalytic converter, checking: Notes

Special tools, testers and auxiliary items required

Fig 1: VAG 1551 Scan Tool

Courtesy of VOLKSWAGEN UNITED STATES, INC.

NOTE:

All functions which could previously be performed with Scan Tool VAG 1551 or Vehicle system tester VAG1552/ can also be performed with the tester VAS 5051.