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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications > Lean fault with AFE intake
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      07-19-2012, 08:50 AM   #1
DR.Nefario
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Lean fault with AFE intake

I'm getting a lean fault P0171 Bank one system too lean. I checked to make sure everything was tight and cleared it and the fault came back. Anyone else running into this issue? I have the N26 motor if that makes a difference.
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      07-19-2012, 03:34 PM   #2
DR.Nefario
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It was just a vacuum line to the crankcase vent. There was nowhere to connect it on the new intake. I'll check with AFE and see if it's because I have the updated N26
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      07-22-2012, 01:57 AM   #3
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How do you like the intake so far?
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      08-01-2012, 01:27 PM   #4
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We (aFe) designed the kit for the N20 engine. BMW released the N26 for the 328i later. We are working on bringing in an N26 to make the provision for the vacuum line. For a temporary fix, you can plug the vacuum line and the CEL will go away. Sorry for the inconvenience. Please PM me with any questions.
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