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  1. VW Jetta MKV 2005.5–2010
    My 2007 Jetta GLI MKV failed emission codes p0171 p0441 p0507. I normally take my car to the dealer for everything only because I am lost when it comes to VW engines. Does anyone know what a good diagnosis of a problem with the 3 codes may be? Hard to start, low in horsepower, RPM run close to...
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