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crankcase

Some 2017-2018 Ford Explorer vehicles equipped with a 2.3L EcoBoost engine built on or before Dec. 7, 2017, may exhibit an illuminated MIL with DTC P04DB (crankcase ventilation system disconnected) in the PCM.

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VW PCV Test

This bulletin applies to 2008-2013 Volkswagen Passat sedans, with regard to crankcase breather diagnosis.  The technician may find rough running, engine noise and MIL on with DTCs P0300, P0301, P0302, P0303, P0304, P2279, P1297, P1093 or P2187 stored in the ECM.