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P0478 Diagnostic Trouble Code Discussion for July 2013

Exhaust Backpressure Control Valve Excessive


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Trouble Ticket Help Requests for DTC P0478
Help Request Posted
2003 Ford F-250 Super Duty Lariat 7.3L Stall VIN: 1FTNX21F13
P0478: Exhaust Backpressure Control Valve Excessive. This has been chipped, testing performed in normal setting. Stalls intermittently upon decel to stop. And can be done in park in service bay. Restarts okay. All numbers appear normal at start up. Warmed up the ICP begins to show 460 to 500 psi yet IPR percent ...
July 30, 2013
2003 Ford F-250 Super Duty Lariat 7.3L Stall VIN: 1FTNX21F13
P0478: Exhaust Backpressure Control Valve Excessive. This has been chipped, testing performed in normal setting. Stalls intermittently upon decel to stop. And can be done in park in service bay. Restarts okay. All numbers appear normal at start up. Warmed up the ICP begins to show 460 to 500 psi yet IPR percent ...
July 30, 2013