Question

Nissan Armada, where is catalyst system efficiency below threshold (bank 2) located?

Answer 1

The "catalyst system efficiency below threshold (bank 2)" is not a component, it means that the Catalytic Convert is not working properly. The Nissan Armada has two Catalytic Converter, one on each side of the engine. On the Nissan Armada Bank 2 refers to the right side (passenger side) of the engine.