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2007 - 2014 Expedition & Navigator 2007, 2008, 2009, 2010, 2011, 2012, 2013 and 2014 Ford Expedition and Lincoln Navigator

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Old 02-24-2013, 08:11 PM
jdm5630 jdm5630 is offline
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code p0420 and p0430

so i just changed the spark plugs on my 07 expy. But i got a check engine light. i took it to auto zone and it ran a p420 and 430 catakyst efficiency low bank 1&2. . what gives. it seems like its 1 thing after another
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