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19/10/2023 12:12 pm
Topic starter
2008 nissan sentra 2.0
So I got a code p 0420 catalyst system efficiency below threshold (bank 1) where do we begin after the lacquer treatment if code reappears. Thank you for your help in advance.
2 Answers
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19/10/2023 1:02 pm
Why did you do a "lacquer treatment"? Have you done any troubleshooting? P0420 is very common code with several possible causes other than the converter itself.
https://www.walkerexhaust.com/support/tech-tips/diagnosing-catalytic-converter-p0420-code.html
https://www.way.com/blog/p0420-code-what-it-is-and-how-to-fix-it/
(Codes only tell you that a particular condition exists, not what specific part or parts are causing the problem.)
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19/10/2023 1:14 pm
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