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P0471 Diagnostic Trouble Code Discussion for January 2012

Exhaust Backpressure Circuit Range/Performance

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Trouble Ticket Help Requests for DTC P0471
Help Request Posted
2006 Ford E-350 Super Duty 6.0L Excessive Emissions, Cuts out, MIL Lamp on VIN: 1FTSS34P06
P0471: Exhaust Backpressure Circuit Range/Performance. trying to diagnose a black smoke and surging under load was told turbo are high failure item on this engine icp desire and actual press are the same at idle (615 psi at idle) and around 1260 psi at 2500 rpm wondering if any ford diesel techs have run into thes...
January 04, 2012