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  1. E46 fault code and engine noise

    General E46 Forum
    Hi everyone! I am new to the forum so bear with me! My newish (2000) 318i has a fault code " 171 Check, fuel supply system (EUIII code: P0170)" Anyone have any ideas? There is an intermittent hissing sound when the engine settles from a rev, and a large hiss when I turn the engine off. -...