Join Now
International Automotive Technicians Network

P0478 Diagnostic Trouble Code Discussion for January 2009

Exhaust Backpressure Control Valve Excessive


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0478
Help Request Posted
2001 Ford F-350 Super Duty Lariat 7.3L thumping noise VIN: 1FTSX31F81
P0478: Exhaust Backpressure Control Valve Excessive. help not a dsl. tech. customer complains of a thumping noise from exhaust when the vehicle is first warming up. only happens when first started cold. I have replaced ebp sensor and tube both were cloged also replaced waste gate solinoid resistance was out of t...
January 28, 2009
2001 Ford F-350 Super Duty Lariat 7.3L thumping noise VIN: 1FTSX31F81
P0478: Exhaust Backpressure Control Valve Excessive. help not a dsl. tech. customer complains of a thumping noise from exhaust when the vehicle is first warming up. only happens when first started cold. I have replaced ebp sensor and tube both were cloged also replaced waste gate solinoid resistance was out of t...
January 28, 2009