Go to this link for fault code P0420
http://www.obd-codes.com/p0420
all this read the catalytic converter is most likely worn out.
This Definition of P0411 is
:
Secondary Air Injection System Incorrect Flow Detected
What does this mean? u have a electric air pump that pumps fresh air into the exhaust system during cold start, this reduces exhaust emissions, that pump is defective, replace it.
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