Catalytic converter, checking: Conditions

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2005 Volkswagen GTI, 2004 Volkswagen Jetta, 2004 Volkswagen GTI, 2003 Volkswagen Jetta, and 2003 Volkswagen GTI. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Main Fuse Panel

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Fuses must be OK.
Battery voltage must be at least 11.5 V.
If vehicle is equipped with air conditioning, this must be switched off.
Selector lever must be in position "P" or "N" on models with an automatic transmission.

Exhaust system between catalytic converter and cylinder head must be free of leaks
Coolant temperature must be at least 85 ° C, → display group 1, display zone 2.
Catalytic converter temperature must be at least 380 ° C, → display group 46, display zone 2.
No DTCs may be stored in DTC memory: → 01 ON BOARD DIAGNOSTIC (OBD)

Oxygen sensor aging before catalytic converter is OK, checking: → 24 MULTIPORT FUEL INJECTION (MFI)
Oxygen sensor aging after catalytic converter is OK, checking: → 24 MULTIPORT FUEL INJECTION (MFI)

NOTE:

The diagnosis will only be ended if the oxygen sensor aging diagnosis before and after catalytic converter is completed successfully first.