Engine light helpps

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March-25th-2012 | 03:07 AM

Claughton17

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Engine light helpps

So I keep having an engine light come on and off at Random times, so I got it tested and it Sao code po421 was just wondering of anybody knows what that code means? Thanks!

March-26th-2012 | 01:52 PM

Thrizzl3

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Joined: Aug 2010

Posts: 35

From: Toronto, Ontario

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P0421 Warm Up Catalyst Efficiency Below Threshold

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