Sensor location p0420 p0172 code o2 p0430 bank1 ridgeline locations honda sensor2 only 2008 located codes persistant fuel sensors preventative Catalyst p0420 efficiency threshold oxygen Persistant codes p0420 and p0430
P0420 Code: Catalyst System Efficiency Below Threshold (Bank 1) - In
P0420 code: catalyst system efficiency below threshold (bank 1)
P0420 Code: Catalyst System Efficiency Below Threshold (Bank 1) - In
Persistant codes P0420 and P0430 - Honda Ridgeline Owners Club Forums