Used 6.7 Power Stroke (2011-present): what to check before you buy

1Before you go

Run the VIN and ask for the paperwork on the campaigns below: a done recall or program is a solved problem, an open one is a free repair the seller has not had done.

• Run the VIN

  It confirms the engine and lists the campaigns for that model year. Whether a recall is still open on this VIN: nhtsa.gov/recalls.

• Safety recalls on this engine
  • 26V-158 · 2020-2022 · Fuel system, diesel
  • 25V-306 · 2025 · Fuel system, diesel
  • 24V-957 · 2020-2022 · Fuel system, diesel
  • 22V-256 · 2020 · Power train
  • 22V-013 · 2021 · Fuel system, diesel
  • 21V-536 · 2020-2021 · Power train
  • 21V-087 · 2020 · Equipment
  • 20V-365 · 2020 · Power train
  • 16V-778 · 2017 · Fuel system, diesel
  • 14V-204 · 2015 · Power train
  • 13V-535 · 2011-2012 · Engine
• Programs, extended coverages and emissions recalls
  • Warranty Extension 20M06 (S1, S2) · Special coverage / warranty extension · 2015-2016 Super Duty, 2016-2019 Medium Duty, 6.7L
  • Ford 21M04 · Program · 2011-2014 Super Duty with the 6.7L

  Plus 1 service bulletins on the recalls page.

2Cold start and idle

Ask the seller not to start or warm the engine before you arrive. Most of these only show on a cold engine; then let it idle and listen.

• CP4.2 high-pressure fuel pump contamination cascade
  • hard starting or a sudden stall, sometimes with no prior warning
  • loss of power that does not clear, often followed by a no-start
• Low-pressure fuel supply weakness (lift pump, filters, water-in-fuel)
  • hard starting, hesitation, or power loss under load consistent with low-pressure fuel starvation reaching the high-pressure pump
• Piezo injector wear and fuel dilution of engine oil
  • hard starting, especially cold, with extended crank times as internal leakage bleeds off rail pressure
  • white smoke at idle (unatomized fuel from a leaking injector) or black smoke under load (an injector stuck rich)
• EGR valve soot clogging / sticking
  • rough idle, hesitation, or surging as a sticking valve mismeters exhaust gas
• Intercooler condensation ingestion + cold-side charge-pipe fatigue
  • a momentary shudder, stumble, or brief misfire on hard acceleration after extended light-load driving in humid weather, sometimes with a puff of white vapor from the exhaust
• Glow plug wear and cold-start faults, plus an isolated 2011-2013 tip-separation defect
  • routine wear: extended cranking and rough running on cold mornings, growing worse as more plugs fail; white/gray smoke at cold start that clears as the engine warms
• VGT turbocharger failure - generation dependent (ceramic-bearing GT32 vs journal-bearing GT37+)
  • gen1 (2011-2014): rising high-pitched whine/screech with engine speed, shaft play, oil consumption, blue-gray smoke, eventually wheel-to-housing contact

3Scan for codes

A basic OBD-II reader shows stored and pending codes; on a diesel ask a shop for a full scan if you can. These are the codes our records tie to known failures on this engine.

What a code means on each engine: trouble codes by engine.

4Hood up and underneath

Engine off, in daylight, with a flashlight.

• CP4.2 high-pressure fuel pump contamination cascade
  • metallic sheen or visible metal flakes in a cut-open fuel filter

  To confirm: cut open the fuel filter and inspect for metallic debris before doing anything else - its presence changes the whole repair scope

• Dual-circuit cooling system leaks (radiator / crossover tube / degas bottle / water pump)
  • low coolant warnings or a slowly dropping degas-bottle level with no visible puddle (small end-tank seeps often evaporate on hot surfaces)
  • sweet coolant smell after a drive, or white crust/dye staining along the radiator tanks and crossover tube
  • water pump weep or bearing growl, most common past 120,000 miles

  To confirm: a pressure tester and UV dye find nearly every leak on this platform - diagnosis is conventional

• EGR cooler thermal-fatigue coolant leak
  • unexplained coolant loss with no visible external leak
  • coolant odor from the exhaust or residue at the cooler-to-manifold joints

  To confirm: pressure-test the cooling system cold and watch for an unexplained pressure drop with no external leak

• VGT turbocharger failure - generation dependent (ceramic-bearing GT32 vs journal-bearing GT37+)
  • oil film or pooled oil in the charge piping (turbo seal transfer, vs normal light crankcase-vapor film)

  To confirm: listen at cold start and under load: a healthy turbo whistles evenly; a rising screech or a note that changes pitch under load points at bearings (gen1 signature)

5Test drive

At least 20 minutes, including a highway run and a hill or a load if you can.

• DEF / SCR / NOx sensor faults
  • check-engine light with codes P20EE (SCR efficiency below threshold), P2200-series (NOx sensor circuit/performance), P204F (reductant/DEF system performance)
  • progressive derate warnings culminating in a 5mph limp if unaddressed
  • DEF warnings/low-dose faults that persist even with a freshly filled, good-quality tank
• DPF clogging / regeneration problems
  • frequent regenerations, more often than roughly every 100-200 miles of mixed driving
  • codes P2463 (DPF soot accumulation excessive) or P246C (DPF restriction)
  • a regen that never completes because the truck was shut down mid-cycle, compounding soot load on the next attempt
  • eventual limp mode if restriction is not addressed
• Piezo injector wear and fuel dilution of engine oil
  • injector circuit codes P0201-P0208 (one per cylinder), or cylinder-specific misfire codes P0301-P0308
• Dual-circuit cooling system leaks (radiator / crossover tube / degas bottle / water pump)
  • rising coolant temperature while towing grades (points to a clogged/airbound system, not just a leak)
  • elevated charge-air and transmission temperatures without a corresponding engine-temp spike - a SECONDARY circuit problem, easy to miss because the primary gauge looks normal
• Intercooler condensation ingestion + cold-side charge-pipe fatigue
  • underboost code P0299 with a hissing/whooshing sound under load, WITHOUT the turbo bearing-noise signature of VGT turbocharger failure - generation dependent (ceramic-bearing GT32 vs...
  • repeated misfire codes with no corresponding injector-balance fault
• VGT turbocharger failure - generation dependent (ceramic-bearing GT32 vs journal-bearing GT37+)
  • gen2/gen3 (2015-present): underboost code P0299, overboost P0234, actuator fault codes P0045-P0048, sluggish spool without the bearing-failure noise signature

6After the drive

Hot engine, parked: the dipstick and the coolant reservoir tell you what the drive did. Then shut it off and restart it hot: some failures only show on a hot restart.

• Piezo injector wear and fuel dilution of engine oil
  • fuel dilution of the oil: a rising oil level or oil on the dipstick that smells strongly of diesel

  To confirm: review cylinder balance and fuel trim data at idle and under load; run PCM power-balance/relative-compression tests to separate fuel problems from mechanical ones

What it costs if you find it

Parts budgets from our repair recipes for this engine: Dave's Auto Center's prices where Dave's lists the part, approximate OEM and maker catalog prices (rounded) for the rest; labor not included. A campaign listed next to a failure may make the repair free on a covered truck: check it by VIN.