Trouble code P0420 means: Catalyst System Efficiency Below Threshold (Bank 1)
Trouble code P0420 means: Catalyst System Low Efficiency (Bank 1)
Trouble code P0420 means: Catalyst system efficiency below threshold (bank 1)
Trouble code P0420 means: Catalyst Efficiency Below Normal (Bank 1)
Trouble code P0420 means: Catalyst Efficiency Below Normal (Bank 1)
trouble code P0420 means: Catalyst Efficiency Low - A Bank
Trouble code P0420 means: Catalyst System Efficiency Below Threshold (Bank 1)
Trouble code P0420 means: Catalyst System Efficiency Below Threshold (Bank 1) Replace O2 Sensor?
Trouble code P0420 means: Catalyst Efficiency Below Normal (Bank 1)
Trouble code P0420 means: Catalyst System Efficiency Below Threshold (Bank 1)
Trouble code P0420 means: Catalyst Efficiency Below Normal (Bank 1)
Trouble code P0420 means: Catalyst System Efficiency Below Threshold (Bank 1)