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P0471 Diagnostic Trouble Code Discussion for September 2010

Exhaust Backpressure Circuit Range/Performance

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Trouble Ticket Help Requests for DTC P0471
Help Request Posted
2000 Ford Expedition XLT 5.4L Surge VIN: 1FMRU15L0Y
P0471: lean bank 2 sensor 1. Everything we have done has progressivly made the truck run better, I am just baffled that when I watch the o2 on the scanner under full throttle accel the o2 drops to lean but the other one goes to full rich like its supposed to, i also think under full throt...
September 21, 2010