Question about 2005 Subaru Forester

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Check Engine Light

2005 Subaru Forester shows Fault Code 0420. After clearing codes it comes back in a few weeks or months. Car always runs fine.

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Hello engelhard58
I have attached a link that can give you some of the reasons why your getting that code.I hope you able to get your answer out of that.
Mean of the code=P0420 Catalyst System Efficiency Below Threshold.
Link to site

Posted on Dec 12, 2008

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I have problem toyota camry p 0420

Posted on Jun 16, 2009

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Posted on Jan 02, 2017

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