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P0471 Diagnostic Trouble Code Discussion for February 2005

Exhaust Backpressure Circuit Range/Performance

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Trouble Ticket Help Requests for DTC P0471
Help Request Posted
1999 Ford F-350 Super Duty Lariat 7.3L Poor Fuel Economy, lack of power VIN: 1FTWX33FXX
P0471: Exhaust Backpressure Circuit Range/Performance. This is my first time here so bare with me. Please help I am limited in knoweldge of a diesel. Here we go, The truck came in for a lack of power while pulling a load and horrible fuel mileage. The truck has a history of problem and the original owner sold vehi...
February 02, 2005