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P0478 Diagnostic Trouble Code Discussion for March 2012

Exhaust Backpressure Control Valve Excessive

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Trouble Ticket Help Requests for DTC P0478
Help Request Posted
2004 Ford F-550 Super Duty Lariat 6.0L Hesitation VIN: 1FDAF56P44
P0478: Exhaust Backpressure Control Valve Excessive. cust just purchased this truck. on his 600 mile trip home he had the low fuel light come on and no throttle response 4 or 5 times for about 5 sec. each time. after the light went off all was fine. have driven about 100 miles myself has not done it for me. hopi...
March 19, 2012