What is the likelyhood that the catalytic converter has indeed failed or could I get that same code if it were just a sensor gone bad?
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2008 Chevrolet Aveo Question: I am getting the code PO420 Catalyst efficency low bank
Answer #1chinasinoy April 16, 2012, 23:50Journeyman
this is an obd2 trouble code table, it can help you understand the meaning of code.
Answer #2jedisolo21 January 16, 2013, 04:30Technician
It means that your muffler system as well as your exhaust system need to be replaced. If it is the catalytic converter, you are looking at close to $1,000 or more to get that replaced. Take it to Midas or to Merchant Tire Auto or to your dealership or to a trusted mechanic to have them look at it. Have them run a diagnostic on the Check Engine light to see if that can tell you what the problem is. More than likely it could be the exhaust system going out.