Question about 2006 Volkswagen Passat
It means vacuum leak, with valve cover crack, that will give you a lean problem, replace valve cover and clear codes.Should be good to go.
Posted on Aug 19, 2010
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Posted on Jan 02, 2017
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The code P0170 means that the air-fuel mixture coming in to the engine is too lean, or too rich. Usually it's the lean condition that causes this code. The code P0173 means the same, only for the Bank 2. Some car manufacturers list the description for the code P0170 as self adaptation out of limits.
The code P0170 could be caused by a number of reasons, such as vacuum leaks, bad PCV valve, or other parts of crankcase ventilation system, low fuel pressure, bad oxygen sensor, bad MAF sensor or even a bad EGR vlave.
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