Possible Causes
WARNING: This page is about a different car, the 2004 Acura 3.5RL, 2003 Acura 3.5RL, 2002 Acura 3.5RL, and 2001 Acura 3.5RL. However, it is still accessible from the selected car via links, so may be relevant.
Catalyst system efficiency that is below threshold can be caused by:
- Deteriorated three-way catalytic converter.
- Leak in exhaust system.