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Old 05-01-2015, 05:45 PM   #1
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Permanent o2 code

I have a 2011 5.0 as soon as I bought it I put long tube headers or xpipe and a air aid intake it's been running perfect for 24000 miles with no issues but recently the engine light came on i changed the o2 sensor thinking it would solve the problem and it came back on a few miles later saying it was a permanent code I've never heard of that before any ideas??

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Old 05-01-2015, 06:40 PM   #2
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Which code came up? Which sensors did you replace? Who tuned it? Need more info.
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