It means that the catalytic converter is not performing to specifications and should be replaced.
Catalyst system efficiency below threshold, bank 1. Catalyst system efficiency below threshold, bank 1.
P0430 Catalyst System Efficiency Below Threshold (Bank 2)
catalyst efficiency below threshold (bank 1)
P0421 code = Warm up catalyst efficiency below threshold, Bank 1
Trouble code P0420 means: Catalyst system efficiency below threshold (bank 1)
Trouble code P0422 means: Main Catalyst Efficiency Below Threshold (Bank 1)
P0420 Catalyst System Efficiency Below Threshold (Bank 1)
16803 - Main Catalyst, Bank1 Below Threshold 16803 - Main Catalyst, Bank1 Below Threshold
Trouble code P0420 means: Catalyst System Efficiency Below Threshold (Bank 1)
Trouble code P0422 means: Main Catalyst (Bank 1) Efficiency Below Threshold
Code P0420 means "Catalyst System Efficency Below Threshold (Bank 1)" P0420 is actually Catalyst System Efficiency Below ThresholdCatalyst System Efficiency Below Threshold. Bank 1 is the side of the engine with cylinder #1. This code means that the catalytic converter is not cleaning the exhaust properly or the oxygen sensors are sending false info to the computer.
Trouble code P0422 means: Main Catalyst Efficiency Below Threshold (Bank 1)