Check for exhaust leaks, test oxygen sensor operation, replace the catalytic converter.
Catalyst system efficiency below threshold, bank 1. Catalyst system efficiency below threshold, bank 1.
P0420 Catalyst System Efficiency Below Threshold (Bank 1)
This code is for the catalyst system efficiency is below threshold
P0420 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.
It means that the catalytic converter is not working properly.
catalyst efficiency below threshold (bank 1)
Trouble code P0420 means: Catalyst System Efficiency Below Threshold (Bank 1)
Trouble code P0420 means: Catalyst system efficiency below threshold (bank 1)
Trouble code P0420 means: Catalyst System Efficiency Below Threshold (Bank 1)
Trouble code P0420 means: Catalyst System Efficiency Below Threshold (Bank 1)
Trouble code P0420 means: Catalyst System Efficiency Below Threshold (Bank 1)