The Ford 6.7L Powerstroke (Scorpion) replaced the troubled 6.4L and brought Ford's diesel program back to credibility. The 6.7L is genuinely good - but it has a few major risks: the CP4.2 fuel pump can grenade and destroy the entire fuel system, and DPF/EGR systems fail predictably with mileage.
The 6.7L is one of the better modern diesels but the CP4.2 pump is a $10,000+ failure waiting to happen on certain VINs. A $1,000 bypass kit is the smartest preventive purchase a 6.7L owner can make.
The Bosch CP4.2 high-pressure fuel pump runs dry under low-lubricity diesel and self-destructs. Metal contaminates the entire fuel system - pump, rails, injectors, lines. A $1,000 disaster prevention kit (CP4 bypass or pump conversion) is the standard preventive move.
Get a free diagnosis →Like every modern diesel, the EGR cooler can crack and dump coolant into the intake. Worst on 2011-2014 trucks. 2015+ trucks improved cooler design.
Get a free diagnosis →Short-trip driving prevents proper DPF regeneration. Symptoms include reduced power, frequent regen cycles, and check engine lights. Cleaning, replacement, or programming required depending on severity.
Get a free diagnosis →Early Garrett single-sequential turbos had bearing and shaft issues, especially under heavy tow. Updated 2015+ turbo is significantly stronger.
View P0299 Diagnosis →Hard cold starts in winter often trace back to a failed glow plug control module or individual glow plugs. Fix is straightforward but parts can be backordered.
View P0670 Diagnosis →Plastic-tank radiators and various coolant connections develop slow leaks at high mileage. Standard wear-and-tear fixes.
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2011-2014 (worst combination of EGR, DPF, and turbo issues). The CP4 risk exists across all years - budget for a bypass kit regardless.
2017-2019 trucks are the sweet spot - updated turbo, refined emissions, more power, and most early gremlins resolved. 2020+ trucks are stronger still but command a premium.
Plan on $1,000 for a CP4 bypass or disaster prevention kit (highly recommended). Routine maintenance is $1,000-$1,500/year due to diesel oil capacity and fuel filters. Major repairs (EGR, turbo, DPF) over 200K commonly run $3,000-$6,000 cumulative.
If you see a check engine light, these codes most often relate to the issues above. Click any code for full diagnosis steps and typical repair costs.
Yes - the 6.7L is one of Ford's better diesels and far more reliable than the 6.0L or 6.4L. The CP4 fuel pump is the main long-term risk.
An aftermarket bypass valve that catches contaminated fuel before it reaches the injectors if the CP4 fails. Roughly $1,000 installed. Saves you from a $10,000+ fuel system replacement.
It is illegal in most U.S. states under the Clean Air Act and can void warranty plus prevent registration. Stick with proper maintenance and updated factory parts.
2017-2019 is the sweet spot - updated turbo, refined fuel system, mature emissions calibration. 2020+ is even better but more expensive.
A well-maintained 6.7L with a CP4 bypass routinely reaches 300,000-400,000 miles. Without bypass, one CP4 failure can effectively total the engine financially.