Code Po420

Asked by Jul 21, 2017 at 12:26 PM about the 2005 Subaru Forester X

Question type: Maintenance & Repair

Replaced coil, coil wires and spark plugs. CAT is
clean. Code keeps coming back after each
replacement

1 Answer

85,725

Read this and maybe it will help ----- https://www.discountconverter.com/catalytic_converters_news/news _page.cfm?Key=catalytic_converter-&News=120

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