A strong diesel overall, but the CP4 fuel pump is the headline risk, and the early trucks had turbo and cooling issues. Fuel-system failure can be catastrophic.
Ford's 6.7 Power Stroke is a capable, durable diesel that fixed many of the sins of the engines before it — but it carries one genuinely catastrophic risk in the CP4.2 fuel pump, and the early model years had their own turbo and cooling growing pains.
A CP4 failure can send metal through the entire fuel system, requiring a complete and very expensive replacement.
CHECK Inspect for metallic debris, check fuel-system service history, and ask about a disaster-prevention bypass kit.
The first model years had turbocharger and EGR-cooler failures.
CHECK Scan for turbo/EGR codes and road test for power and limp mode.
The primary water pump is internal — replacement is a cab-off job on some years.
CHECK Check for coolant loss and overheating history.
After-treatment and DEF faults are a known nuisance.
CHECK Scan the after-treatment and confirm no DEF or derate warnings.
Bidirectional OBD-II scan tool · Paint depth gauge · Tire tread depth gauge & DOT date decoder · Brake pad & rotor calipers / measurement tools · Battery & charging system tester · Compression and cylinder leak-down testers · Digital borescope · Floor jack and jack stands …
See the full Pre-Purchase Vehicle Inspection tool kit →
Pre-tagged for the Ford F-250 / F-350 Power Stroke 6.7 (2011–2019).