Kellz247 Posted August 19, 2019 Share Posted August 19, 2019 I got my car scanned and it was diagnosed to pop up p0420 code. Does it mean my oxygen sensor (which of the sensors) is bad or the catalyst converter is bad? Quote Link to comment Share on other sites More sharing options...
gbhrps Posted August 20, 2019 Share Posted August 20, 2019 Kellz247, Check the exhaust system for leaks, use a catalytic converter cleaner to remove deposits, fix or replace a possibly damaged oxygen sensor, or replace the catalytic converter, are all possible fixes that any good independent mechanic can diagnose and correct, usually a lot cheaper than your Lexus dealership. Quote Link to comment Share on other sites More sharing options...
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