P0420 Honda P0420 Honda – Catalyst System Efficiency Below Threshold Bank 1
honda ridgeline engine code p0420 Direct Download speed 7287 Kb/s
honda ridgeline engine code p0420 Full Version speed 5567 Kb/s
Hi all, my check engine light came on. I took it to Auto Zone, they hooked up there computer and the code P0420 came up Catalyst System Efficiency
Check Engine Light Code P0420 Catalyst System Efficiency Below Threshold (Bank 1) Description: How does a P0420 code trigger the check engine light?
2007 honda accord 2.4l. engine code P0420 showing, can someone help me what is suppose to be the problem. and how to fix it. thanx
Honda Civic 2001 Engine light on. Code P0420 Posible problems aa1: A/F ratio concern aa2: Air leak ner HO2S (Heated oxygen sensor) bank 1 aa3: Ignition system concern …