Trouble code P0420 means:Catalyst system efficiency below threshold
Trouble code P0420 means: Catalyst Efficiency Below Threshold (Bank 1)
Trouble code P0420 means: Catalyst Efficiency Below Threshold (Bank 1)
Trouble code P0420 means:Catalyst system efficiency below threshold
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Trouble code P0420 means:Catalyst system efficiency below threshold
Catalytic converter efficiency failure.
Trouble code P0420 means:Catalyst system efficiency below threshold
trouble code P0420 means: Catalyst Efficiency Low - A Bank
Trouble code P0420 means:Catalyst system efficiency below threshold
Trouble code P0420 means:Catalyst system efficiency below threshold
Trouble code P0420 means:Catalyst system efficiency below threshold
Trouble code P0420 means: Catalyst Efficiency Below Normal (Bank 1)