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P0471 Diagnostic Trouble Code Discussion for January 2011

Exhaust Backpressure Circuit Range/Performance

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Trouble Ticket Help Requests for DTC P0471
Help Request Posted
2002 Ford F-150 XLT 5.4L MIL Lamp on VIN: 1FTRW08L12
P0471: testing and results. In have a 2002 ford f150 5.4 it came in with maf sensor and lean exhaust codes i replaced maf with ford part and lean exhaust codes came back i have smoked the intake and sprayed intake gaskets with propane the stft and long trim fuel trim numbers did not chan...
January 10, 2011