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The never ending lean code
Po171
174. Bank 1 and 2 lean
Changed turbos
Valve cover and gasket
2 smoke tests performed.
No air duct leaks from what I can see
New symptom only once 29f1 (fuel pump plausibility ).
Not sure if that’s the fuel pump or something else causing the pump not to work properly.
Anything helps. I need an expert on e60 2008 535xi.
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