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P0478 Diagnostic Trouble Code Discussion for November 2013

Exhaust Backpressure Control Valve Excessive

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Trouble Ticket Help Requests for DTC P0478
Help Request Posted
2005 Ford F-550 Super Duty XLT 6.0L severe lack of power VIN: 1FDAF56PX5
P0478: Exhaust Backpressure Control Valve Excessive. ... working on these trucks in a dealer since they were new. Now independent. Got a tow truck here that isn't building boost, Customer has done lots of work prior to bringing it in. The only code I had to work with was P0299. They replaced turbo for typical we...
November 18, 2013