What is code p0420 for the chevy cruze?

The exact trouble code meaning for P0420 is CatalySTSystem Efficiency Below Threshold (Bank 1). Receiving the code on the Chevy Cruze usually indicates that there is a problem with the catalytic converter. Basically, it means that the component is not doing its job, which is to capture the byproducts of combustion and filter out pollution before exiting Your car's exhaust. This error is important fortwo reasons. First, passing any emissions requirements for Your vehicle's inspection will be difficult if not impossible. Secondly, You could potentially be polluting the environment with toxic chemicals. Getting this situation remedied as quickly as possible is quite important. Avoid failing inspection and contributing to Climate Change by having Your mechanic check Your car out and fix this problem as soon as You can.