Code po420
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Join Date: Jan 2016
Location: Las Vegas
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Code po420
Found both bank one and bank two po420 codes. I found on Amazon what is called a o2sensor extension. $9.95 each. It's a sleeve that goes over the o2sensor and screws into the exhaust where the o2sensor goes. No modifications. It gets the o2sensor out of the exhaust gases but still shows it's working to the ecm. No more codes. And no $1000 cat 😀