I have bank 1 0420 code that say i need a catalyic converter? And it hard starts

What is your question?

I have a bank1 0420 code. An hard start. Now my car shut down it try start but won't kick all the way over.

What makes this problem better or worse?

Hard start.bank1 0420 sensor Catalytic probably clod up im told it might need a chain

How long has your 2009 Chevrolet Traverse had this problem?

1Yr