6.7L Power Stroke CP4 high-pressure fuel pumpmajor
- 6.7L Power Stroke diesel
The Super Duty's signature diesel failure carries into the new generation. The Bosch CP4.2 high-pressure fuel pump can run dry and make metal, which then contaminates the whole high-pressure system — pump, injectors, lines, and the fuel conditioning module — turning a pump failure into a roughly $10,000 full-fuel-system job (mechanic-quoted). Contaminated fuel, missed filter services, and misfueling (gasoline or DEF in the diesel tank) are the triggers. Pull the lower fuel filter and look for metal glitter before you buy, and ask for fuel-filter service records.
Sources: NHTSA recall database, 2017 F-250 SD (complaints total pending local pull) · Independent mechanic and Ford-tech channel transcripts (Super Duty)
$0
Clean fuel, filters serviced
~$10,000 (mechanic-quoted)
Pump grenades / full fuel system