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P0471 Diagnostic Trouble Code Discussion for January 2008

Exhaust Backpressure Circuit Range/Performance

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Trouble Ticket Help Requests for DTC P0471
Help Request Posted
2000 Ford F-250 Super Duty Lariat 7.3L No Start, Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on VIN: 3FTNX20F1Y
P0471: Exhaust Backpressure Circuit Range/Performance. owner complaints of loss of power, hard or no start verified. only when fully warmed up. alldata tells me engine controls increase exhaust back pressure when cold to warm up faster. coolant temp sensor bad, low resistance or shorted, but new motorcraft sensor ...
January 14, 2008