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exhaust leak
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  1. 2013-2018 Nissan Altima Discussion (2.5 & 3.5)
    So I have been getting the 420 code for awhile but have not needed to get it fixed till now. I have ran it with the scanner, erased the code multiple times (just to check) replaced both o2 sensors and still kept getting the code. I did notice a crack right past the flex pipe in the exhaust pipe...
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