Just changed head gaskets and timing chain on my 2006 Nissan Altima 2.5 now catalyst threshold is haywire

Asked by Corietheriot75 Dec 01, 2018 at 12:42 PM about the 2006 Nissan Altima 2.5

Question type: Maintenance & Repair

Just changed the head gaskets and timing chain on so why did my engine
light2006 Nissan Altima 2.5 stay on and now my muffler is spewing oil soot and
the meter reads catalyst emissions threshold P0420

1 Answer
101,605

KenF answered 5 years ago

Is the timing off? That is one of the possible causes for that code. Review the timing chain install.

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