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Bank 1 too lean code 2006 f150 5. 4l v8

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Old 04-28-2016, 08:55 PM
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I have had mine gone off 2 times since I did my muffler. I cleared it the second time with a scanner and I disconnected the battery the 1st time and it hasn't popped up since. I don't have enough backpressure no more though so the motor feed the engine.
Old 04-28-2016, 08:59 PM
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Originally Posted by Project_Red
I have had mine gone off 2 times since I did my muffler. I cleared it the second time with a scanner and I disconnected the battery the 1st time and it hasn't popped up since. I don't have enough backpressure no more though so the motor feed the engine.
So does your truck run right now or not?
Old 04-28-2016, 09:11 PM
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I have 04 doing same thing can't find anything myself
Old 04-29-2016, 09:28 AM
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Check the cat on the passenger side.. could be clogged.
Old 04-29-2016, 04:55 PM
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It runs perfect. Just throws a code for not enough to backpressure



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