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i have '97 bmw 740i, and got a check engine light come on. code says p1174, & p1175. my research says it's"Fuel Trim Adaptation Additive Bank 1 Malfunction". Un-metered air leaks may occur in the following areas causing the above situation: Intake manifold gaskets may be leaking. Plug cap(s) and the vacuum hose for the fuel pressure regulator on the ...

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