The 2019 F-350 with the 6.7L Power Stroke is generally a workhorse diesel, but CP4 fuel pump failures remain the nightmare scenario, and emissions components demand attention as miles accumulate. Build quality is solid, but when things break, they break expensive.
CP4 Fuel Pump Catastrophic Failure
Occasional · high severityTypical onset: 60,000-150,000 mi
Symptoms: Sudden loss of power, engine dies and won't restart, Metal shavings in fuel system contaminate entire fuel delivery path, No warning signs in most cases—just instant failure
Fix: Complete fuel system flush and replacement: pump, injectors (all 8), fuel lines, tank cleaning, filters. 20-30 labor hours depending on contamination severity. This is the single most expensive non-accident repair on this platform.
Estimated cost: $8,000-15,000
EGR Cooler Failure and Clogging
Common · medium severityTypical onset: 80,000-120,000 mi
Symptoms: White smoke from exhaust on cold starts, Coolant loss with no visible leaks, P0401 or P0402 EGR flow codes, Steam from exhaust, sweet smell
Fix: EGR cooler replacement requires cab removal or pulling engine partway out depending on tech preference. Figure 12-16 hours with cab-off method. Often combine with EGR valve and cooler delete pipes if customer goes aftermarket route.
Estimated cost: $2,800-4,500
DEF System Issues (Injector and Heater)
Common · medium severityTypical onset: 70,000-110,000 mi
Symptoms: DEF warning lights, countdown to 5 mph derate, Poor DEF quality detected messages, DEF system fault—service required, Won't start or limited to 5 mph if ignored
Fix: DEF injector is the common culprit, mounted in the decomp tube. 3-5 hours labor. DEF tank heater failures also occur. Always replace DEF filter housing with injector—it's integrated and will fail shortly after if reused.
Estimated cost: $1,200-2,200
Turbocharger Wastegate Actuator Sticking
Occasional · medium severityTypical onset: 90,000-140,000 mi
Symptoms: Overboost or underboost codes (P0234, P003A), Limp mode, significant power loss, Turbo whistle changes pitch or becomes louder, Black smoke under acceleration
Fix: Electronic actuator replacement usually solves it—6-8 hours labor. If turbo bearings are worn (check for shaft play), full turbo replacement needed. 2019s have the newer-style actuator that's more reliable than previous years, but still fails.
Estimated cost: $1,800-3,500
Transmission Oil Cooler Line Leaks
Common · low severityTypical onset: 50,000-100,000 mi
Symptoms: Transmission fluid drips near radiator area, Puddles under truck after parking, Low transmission fluid warnings, Pink residue on cooler lines or radiator
Fix: Quick-connect fittings and lines corrode or crack. Line replacement is 2-3 hours. Check both supply and return. Sometimes cooler itself develops pinhole leaks—add another 2 hours if cooler replacement needed.
Estimated cost: $400-900
High-Pressure Fuel Pump (HPFP) O-ring Leaks
Occasional · medium severityTypical onset: 60,000-110,000 mi
Symptoms: Diesel fuel smell in cab or engine bay, Visible fuel seepage at HPFP mounting area, Hard starting when warm, Fuel pressure codes (P0088, P0087)
Fix: O-ring replacement at HPFP connection points, 4-6 hours. Access is tight. Always replace all associated seals while in there—they're hardening from heat cycles. Not the CP4 pump itself failing, just the sealing surfaces.
Estimated cost: $800-1,400
Cab Bushing and Mount Deterioration
Common · low severityTypical onset: 60,000-100,000 mi
Symptoms: Cab squeaks and rattles over bumps, Clunking noise from cab mounts, Visible cracking in rubber bushings, Cab movement you can feel during acceleration/braking
Fix: Four cab mounts plus bushings. 4-6 hours to replace all. Requires lifting cab slightly. Common on all Super Duty trucks, especially work trucks seeing rough roads. Not safety-critical but annoying.
Estimated cost: $600-1,200
Buy one if you need the capability and can stomach the CP4 lottery—keep $10k in reserve for that scenario or install a CP3 conversion preemptively; otherwise it's a strong diesel platform.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.