Try replacing Catalytic Converter on the opposite side of cylinder 1
Catalyst system efficiency below threshold, bank 1. Catalyst system efficiency below threshold, bank 1.
Catalyst efficiency below threshold, your catalytic converter may have failed.Catalyst efficiency below threshold, your catalytic converter may have failed.
What is a PO420 in a 2002 mercury cougar: Now if your car is 2.0L DOHC. OBD ll PO420 : Catalyst Efficiency Below Threshold (BANK 1). Hope this helps...
This code is for the catalyst system efficiency is below threshold
P0430 Catalyst System Efficiency Below Threshold (Bank 2)
Catalyst System Efficiency Below Threshold (Bank 2)
Trouble code P0432 means:Main catalyst efficiency below threshold
It's Catalyst system efficiency below threshold
It means that the catalytic converter is not working properly.
catalyst efficiency below threshold (bank 1)
P0420=Catalyst System efficiency below threshold
P0420 Catalyst System Efficiency Below Threshold (Bank 1)