Exhaust Gas RECIRCULATION
WARNING: This page is about a different car, the 2002 Volkswagen EuroVan, 2001 Volkswagen EuroVan, and 2000 Volkswagen EuroVan. However, it is still accessible from the selected car via links, so may be relevant.
Exhaust gas recirculation (EGR) systems will set DTCs. See appropriate SELF DIAGNOSTICS article for diagnosis.