DTC P0420: Low Catalyst Efficiency Bank 1 Or DTC P0430: Low Catalyst Efficiency Bank 2: Notes
WARNING: This page is about a different car, the 2002 Isuzu Rodeo Sport, 2002 Isuzu Rodeo, 2002 Isuzu Axiom, and 2002 Honda Passport. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Bank 1 refers to right cylinder bank. Bank 2 refers to left cylinder bank.