Owners report three recurring trouble areas: excessive oil burn, cam phaser rattles, and transmission shifting issues. The oil problem shows up early—1 quart per 1,000–2,000 miles—with blue smoke and burnt smell. Ford techs find oil-washed cylinders and worn piston rings; the root cause points to PCM programming allowing too much crankcase vacuum on deceleration, pushing oil into the cylinders. Ford's fix—PCM reprogram and longer dipstick—often fails, and replacement engines sometimes exhibit the same defect within months.
Cam phaser noise (a cold-start rattle lasting seconds) hits between 25,000 and 70,000 miles, worst on the 3.5L EcoBoost. Owners cite stretched timing chains and worn VCT units that Ford can repair but parts are perpetually on backorder. The rub: Ford issued two non-recall programs (21B10 and 21N03), both expired, and many owners never got notification letters. Denied coverage is common once warranty lapses.
Transmission hard shifting, jerking, and erratic upshifts to 5th–6th gear are reported, especially after PCM updates intended to fix cam phaser issues. One owner experienced transmission failure at 18,000 miles right after a cam-phaser recall visit. Towing a trailer triggers engine stalls on 2.7L models when coming to a stop—a Ford TSB exists, but dealers won't apply it unless you demand it by bulletin number.
Finally, some 5.0L V8s knock loudly under acceleration and towing; dealers have declared this "normal," despite it never happening on previous model year engines and owners report pages of online complaints. Engine seizures, though rare, occur without warning at highway speed, stranding drivers with zero power steering or brakes.
Failure modes owners describe
Excessive Oil Consumption
Engine consumes oil rapidly, typically 1 quart per 1,000–2,000 miles, with no external leaks. Owners report low oil warnings, blue smoke from exhaust, and burnt oil smell. Ford-certified techs note oil-washed cylinders, excessive piston-to-wall clearance, and sleeve scarring. Affects both 3.5L EcoBoost and 5.0L V8 engines. Root cause: PCV system malfunction and PCM programming allowing excessive oil vacuum on deceleration, washing oil into cylinders. Some replacement engines exhibit same problem immediately after install.
When: Typically noticed between 2,000–10,000 miles; worsens over time. One case reported 3–4 quarts per 3,000 miles at 155,000 miles.
Symptoms owners cite: Low oil warning light; Blue smoke from exhaust; Burnt oil smell under hood and from exhaust; Engine running rough; Loss of power; Check engine light (P0022 and other codes); Chronically low dipstick readings
Codes mentioned: P0022 (Intake Camshaft Position Timing Over-Advanced), P164C (possible)
Repairs/costs cited: TSB 19-2365: PCM reprogramming, new engine oil level indicator, dipstick replacement. Ford initially tried longer dipstick and PCM updates. Engine replacement ($6,603–$10,000+) sometimes required; replacement engines may have same defect. Warranty denial via third-party extended warranty loopholes reported. One owner cited replacement engine had same problem within 3 months; dealer replied defect corrections were never confirmed as applied.
Recalls/TSBs owners mention: TSB 19-2365 (Excessive Oil Consumption); TSB 18-2354 (reprogramming and longer dipstick, ineffective); extended warranty denials; partial warranty coverage offers ($6,603.37 parts cost, dealer cost ~$1,256); engine replacement at customer expense; some owners report Ford covers half repairs only; no full recall issued.
Cam Phaser / VCT (Variable Camshaft Timing) Rattle and Failure
Cold-start rattling, tapping, or ticking noise from engine top, usually lasting 2–5 seconds. Noise resembles diesel engine or loose valves. Affects 3.5L EcoBoost (3.5L VCT units) and reported in 5.0L. Cam phaser units wear prematurely or fail. Advanced cases show metal shavings in oil, loss of motive power, and stalling. Timing chain stretching documented; can cause catastrophic engine failure if unrepaired.
When: First appears at 25,000–70,000 miles. Cold starts after 6+ hours of soak most common; can worsen to occur every start.
Symptoms owners cite: Loud cold-start rattling, tapping, ticking from front engine compartment; Noise lasts 2–5 seconds then fades; Noise occurs more during deceleration and low-RPM operation; Engine shuddering on initial startup; Intermittent stalling, especially during auto-start-stop; Loss of motive power without warning; Metal shavings in engine oil (advanced); Check engine light (intermittent or persistent); Rough idle at traffic lights
Codes mentioned: P164C (Cam Phaser issue, intermittent no-restart during auto-start-stop)
Repairs/costs cited: TSB 23-2143 (04 May 2023): Replace VCT units; certain parts reusable per service procedure. Repair typically requires 15+ labor hours. Cost varies $2,000–$3,158+ for phaser replacement alone, with additional components recommended. Parts frequently on back-order; wait times 3+ weeks common. One customer waited 2.5 months for parts; mislabeled parts extended work further.
Recalls/TSBs owners mention: FSA 21N03 (Customer Satisfaction Program - Cam Phaser Replacement, Engine); FSA 21B10 (PCM Reprogramming for Cam Phaser Rattle); TSB 23-2143. FSA 21N03 expired January 1, 2023, with mileage cap (warranty expiration basis varies). Non-recall status; owners out of program/warranty pay full cost. Owners report not receiving notification letters despite Ford claim. Owners report repeated failures after repair and phaser replacement with 'refurbished' parts (not new). One customer had phaser replaced under warranty, then failed again at 91,157 miles—repair denied as out of coverage. Technicians acknowledge issue continues to recur and no permanent fix confirmed.
Engine Knock / Detonation Noise (5.0L V8)
Loud, concerning knocking sound, especially when accelerating hard or after recent gear shift before RPMs climb. Sound resembles old diesel engine. Occurs when towing and under heavy load. Occurs early and worsens. Technicians confirm knock on road test and note similar knock on comparison truck, leading Ford to declare it 'normal operation'—contradicting no previous model years with issue.
When: Noticed at 4,546 miles (after first oil change); reported between 10,000–30,000 miles.
Symptoms owners cite: Loud, persistent knocking from engine during acceleration; Knock most noticeable immediately after gear shift and before RPM climbs; Knock audible inside cabin when towing; Engine sounds like diesel engine under load; Knock worsens with heavy towing or hauling
Repairs/costs cited: One case: TSB 18-2354 applied (reprogramming); VCT valve replacement attempted; knock persisted. Comparison truck exhibited same knock. Ford concluded 'normal operation.' Multiple shop visits yielded no resolution; no TSB fully corrects issue.
Recalls/TSBs owners mention: TSB 18-2354 (reprogramming and dipstick); attempted VCT valve replacement. Ford declared issue 'normal operating characteristics' despite knocking absent on new vehicle and previous model years. Corporate customer care closed case with no further action. No recall issued. Owners report Google search shows pages of similar complaints.
Transmission Hard Shifting, Shuddering, and Loss of Power
Erratic transmission behavior: extreme hard upshifts, delayed gear engagement, shuddering, jerking, hesitation, and loss of acceleration response. RPMs skyrocket (4.5k–6.5k) before violent upshift to 5th–6th gear, sometimes accompanied by tire squealing and loss of steering/braking assist. Vehicle can shift hard enough to cause near-accidents. Affects 10R80 transmission. Progression: intermittent to chronic. Occurs during normal driving, merging, and low-speed maneuvers.
When: Reported between 18,000–122,000 miles. One case: transmission failure at 18,000 miles following 21B10 PCM update.
Symptoms owners cite: Hard, aggressive upshifting without smooth progression; RPMs skyrocket (4.5k–6.5k) before upshift; Delayed gear engagement despite pedal depression; Shuddering/vibration felt throughout truck during shifts (gears 1–3); Jerking and hesitation on acceleration; Inability to gain speed despite pressing gas pedal; Shifting feels like manual transmission driven by inexperienced driver; Vehicle stalls at traffic lights or intersections (intermittent); Rear tire squealing during hard upshift; Auto-start-stop malfunction message displayed; Vehicle slips to neutral during motion (reported)
Codes mentioned: 21B10 (Cam Phaser reprogram—correlation to transmission issues reported)
Repairs/costs cited: Multiple dealer visits and software updates unsuccessful. Rework estimated 10–30 hours labor; parts ordered with 30–45 day backlogs. Transmission replacement cost: $9,500–$10,000+. One customer: 21B10 PCM reprogram in July; transmission failed August at 18,000 miles.
Recalls/TSBs owners mention: Multiple technical service bulletins issued (Ford aware since 2017 of 10R80 defect per complaint #37). No recall for 2018 models; 2021 models recalled for same issue. Ford service departments diagnose and quote repair, declining warranty coverage for many cases. Owners directed to NHTSA. Transmission replacement recommended by dealers; warranty typically expired or denied.
Engine Stall When Towing (2.7L EcoBoost)
Engine stalls when coming to a stop after extended towing (1+ hour). Vehicle enters auto-start-stop mode; upon restart, engine dies immediately. Requires foot on gas, brake held, and forceful gear engagement to move. Stalls also occur when restarting after refueling while towing. No check engine code triggered. Dangerous at intersections and stop-and-go traffic; loss of power steering and braking assist occurs.
When: First occurrence after ~200 miles towing; recurred 20+ times/day during multi-week US/Canada tour. Intermittent in early stages, recurring in later stages.
Symptoms owners cite: Engine stalls at stop after towing >1 hour; Immediate stall upon restart (loop); Auto-start-stop malfunction display; Loss of power steering and braking assist during stall; Stalls when restarting after refueling (while towing); No check engine light or diagnostic code; Vehicle requires high RPM/brake slip method to move
Repairs/costs cited: TSB 18-2249 (2.7L F-150 built on/before 27-Nov-2017): PCM reprogramming at latest software level. Dealership applied reprogramming but cannot test fix without customer re-towing 100+ miles. Owner forced to risk safety to validate repair.
Recalls/TSBs owners mention: TSB 18-2249 (PCM reprogramming). Ford issued technical bulletin but does not proactively apply or recall. Dealers apply only if customer provides bulletin or insists. Owners report dealers claim 'unable to diagnose without code.' One owner reports bulletin should be a full recall due to danger.
Low Oil Pressure, Engine Seizure, and Locked-Up Engine
Engine warning lamp illuminates 'Low Engine Oil Level' while driving at highway speed, followed by loud ticking noise from front of engine. Upon shutdown and restart attempt, engine locks up and will not turn over. Complete loss of power steering and braking assist. Engine seizes without warning, stranding driver on interstate. Diagnosed as complete engine failure (internal bearings, turbochargers, water pump all failed). Repair estimate >$20,000.
When: Occurred at highway speed; no prior oil leaks or dashboard warnings.
Symptoms owners cite: Low engine oil warning lamp at highway speed (65+ mph); Audible ticking noise from front engine compartment; Engine seizure / locked crankshaft; Loss of power steering and braking assist (instant); Engine will not crank or turn over after shutdown
Repairs/costs cited: Complete engine assembly replacement required, including turbochargers and water pump. Repair estimate: >$20,000. Diagnosed by Ford-authorized service (Bird Kultgen Ford, Waco TX) on 06-03-2021. Diagnostic and repair estimate on file.
Recalls/TSBs owners mention: No response to certified letter sent 06-23-2021 to Ford Corporate (no acknowledgment in 14+ business days). No assistance or acknowledgment from manufacturer.
Cylinder Head Machining Defect and Stretched Timing Chain
Cylinder heads machined incorrectly (missing supply holes). Causes premature engine failure, loss of compression, loud clicking noise, shudder, rough running, and loss of motive power without warning. Timing chain stretches due to underlying cam phaser/VCT issues, risking engine failure and loss of vehicle control. Metal-on-metal wear noted; continued operation unsafe.
When: Diagnosed after months of loud clicking, horrible gas mileage, and loss of power before dealer diagnosis.
Symptoms owners cite: Loud clicking noise from engine; Horrible fuel economy; Loss of power for many months before diagnosis; Engine shudder; Check engine light (intermittent/chronic); Compression loss in affected cylinder(s); Rough running
Repairs/costs cited: Cylinder heads and camshafts replaced per dealer diagnosis. Recall 17S37 cited as similar but contact's truck not included in recall eligibility. Repair cost not specified, but cylinder head replacement major undertaking.
Recalls/TSBs owners mention: Recall 17S37 exists but contact's VIN not included despite same defect and symptoms. Ford complaint filed; owner reports near-daily contact attempts with no feedback from complaint line. Owner offered formal complaint number upon request.
Catalytic Converter Failure Following PCM Recall (24E12)
Vehicle with no prior issues undergoes mandated Recall 24E12 (PCM reprogramming for emissions monitoring). Within days of recall (fewer than 5 miles driven post-service), check engine light illuminates and vehicle begins smoking from tailpipe. Catalytic converter diagnosed as failed. Dealer quotes $2,446.55 + tax for replacement. Dealer denies connection to recall service despite recall's purpose being emissions system monitoring.
When: Failure occurred 'just a few days' after recall service on 03-12-2025, with fewer than 5 miles driven post-service.
Symptoms owners cite: Check engine light illumination immediately after recall service; Smoke from tailpipe; Catalytic converter failure diagnosis
Repairs/costs cited: Catalytic converter replacement quoted $2,446.55 + tax. No repair completed; customer disputes dealer claim of no connection.
Recalls/TSBs owners mention: Recall 24E12 (PCM Reprogramming for Emissions Compliance). Dealer service (Donley Ford, Galion OH) performed work 03-12-2025. Dealer denies connection between PCM update and converter failure despite recall targeting emissions system. No further assistance offered.
Engine Misfire, Compression Loss, and Cylinder Failure (2.7L EcoBoost)
Vehicle experiences shaking, erratic acceleration, transmission slip-like feel, and check engine light. Diagnosis: misfire in cylinder 6. Technician finds gasoline pooled inside cylinder 6 despite regular maintenance. Compression test reveals well below 100%; subsequent test shows 0% compression after continued diagnosis. Repair shops diagnose fuel dilution and loss of compression as manufacturing defect common to 2.7L EcoBoost engines per forums and technical bulletins.
When: November 2024; compression loss escalated from below 100% to 0% over diagnostic visits.
Symptoms owners cite: Engine shaking and vibration; Erratic acceleration response; Transmission slip-like sensation; Check engine light illumination; Cylinder misfire (cylinder 6); Fuel inside cylinder (anomalous)
Repairs/costs cited: Spark plugs, fuel injectors, and ignition coils replaced initially without resolving issue. Compression test shows 0% in affected cylinder. Engine replacement now recommended at ~$10,000 cost. Previous owner and current owner both maintained regular oil/maintenance schedule.
Recalls/TSBs owners mention: No manufacturer response documented. Online forums and technical bulletins indicate this is recognized defect in 2.7L EcoBoost engines.
Intake Manifold / Runner Defect and Power Loss
Engine produces popping sounds during acceleration and deceleration with response delay. Intake manifold dowels holding interior parts and runners come loose due to improper factory installation or defect. When runners fall out, vehicle loses power abruptly. No warning light or computer error code displayed despite serious defect. Dealer repair: intake manifold/runner controls replacement.
When: At 30,000 miles; manifests during normal acceleration/deceleration.
Symptoms owners cite: Popping sounds from engine during acceleration and deceleration; Power loss when runners dislodge; Response delay on acceleration; Transmission clunking and jerking (coincident); Rough engine running; No warning light or diagnostic code (despite defect)
Repairs/costs cited: Intake manifold/runner controls replacement. Dowels require reinstallation or replacement. Repair performed at dealership; no cost specified.
Recalls/TSBs owners mention: Dealer repair performed; no recall or TSB cited. Dealer indicated this is known issue (downels coming loose). Ford responsibility acknowledged by dealer but no recall issued.
Rough Idle, Misfiring, and Stalling at Traffic Lights
Vehicle idles roughly and misfires when stopped at traffic lights. Engine stalls on one or more occasions. Check engine light illuminates. Cam phaser failure diagnosed and replaced, but problem recurs within weeks or months. Second dealer visit confirms cam phaser failure again. Vehicle cycles through rough idle, check engine light, and stalling repeatedly despite multiple repairs.
When: Occurs intermittently at first, then becomes recurring failure. Failure mileage 58,000–101,000 miles.
Symptoms owners cite: Rough idle while stopped; Misfiring at traffic lights and stops; Engine stall at traffic light (intermittent, then recurring); Check engine light illumination; Abnormal engine noise/rattle
Codes mentioned: Camshaft and crankshaft positioning sensor DTCs
Repairs/costs cited: Cam phaser replacement initially corrects issue, but failure recurs. Second dealer visit confirms cam phaser failure again within mileage limits. Vehicle not yet repaired in these reports.
Recalls/TSBs owners mention: Customer Satisfaction Program 21N03 (Cam Phaser Replacement). Program expired January 1, 2023. Owners out of program/mileage cite denial of coverage. Some coverage gaps documented (VINs not included in program despite matching vehicle model/year/engine specs).
Transmission Failure and Multiple Component Replacement at Low Mileage
Vehicle exhibits hard shifting, jerking, hesitation, and loud banging sound while shifting into gear. Check engine and wrench symbol lights illuminate at low mileage (48,000 miles). Dealer diagnosis: transmission replacement needed; catalytic converter and engine cooling fan also require replacement. Complete powertrain overhaul required very early in vehicle life.
When: At 48,000 miles.
Symptoms owners cite: Hard, jerky shifting; Hesitation at 35 mph when depressing accelerator; Loud banging sound when shifting into gear; Jerking at various speeds; Check engine light and wrench symbol illuminated
Repairs/costs cited: Transmission replacement required; catalytic converter and cooling fan also failed. Repair cost and completion status not provided.
Recalls/TSBs owners mention: Dealer diagnosed and estimated repair; no coverage information provided. Manufacturer informed but details unknown.
Acceleration Hesitation, Stalling, and Transmission Failure Following Recall Service
Vehicle experiences acceleration problems and unsafe driving conditions on interstate following recall 21B10 service in February 2022. Recently purchased used (Nov 2024), vehicle now has acceleration issues and code error 21B10 persists despite 2022 recall repair. Unsafe to drive at highway speeds.
When: Recall performed February 2022; issue resurfaces by March 2025 (purchased Nov 2024 as used).
Symptoms owners cite: Acceleration hesitation and loss of response; Unsafe for interstate driving; Error code 21B10 persists after prior recall service
Codes mentioned: 21B10
Repairs/costs cited: Ford case number CAS-44375296-L5Y1S2. Recall 21B10 performed February 2022; issue reappears. Case cannot be reopened per Ford; requires review.
Recalls/TSBs owners mention: Recall 21B10 performed February 2022. Ford informed customer case cannot be reopened; needs review. No assistance offered. Customer concerns about safety remain unresolved.
Check Engine Light, Reduced Power Derate, and Turbo Overboost Issues (3.5L EcoBoost)
Malfunction indicator lamp and 'Reduce Power' warning occur multiple times at highway speed (60–70 mph), causing abrupt power reduction to 10–20 mph. Happens on freeway without shoulder, creating dangerous situation. PCM/software coding causes power derate when triggered. Turbo overboost suspected but owner emphasizes safety concern is the coding/programming response that derate engine while at speed, not the turbo itself.
When: Occurred 01-25, 01-27, 01-29, and 02-11 (dates from complaint).
Symptoms owners cite: Malfunction indicator lamp illumination; Reduce power warning message; Abrupt power reduction from 60–70 mph to 10–20 mph; Vehicle requires shutdown and restart to resume normal power; Engine light remains on after restart but truck runs normally
Repairs/costs cited: Software upgrade performed at dealer. Turbo overboost suspected as root cause. Vehicle at dealer 3+ days for diagnosis. Coding that derate engine is concern per owner, not turbo repair alone.
Recalls/TSBs owners mention: Software upgrade applied. No other details of resolution provided. Owner requests assurance that power-derate coding be removed as it poses direct safety risk.
Valve Train, Piston, and Rod Noise (5.0L V8)
Excessive valve train, piston, and rod noise from engine, especially under load and towing. Engine sounds like diesel; noise loudest below engine on driver's side when idling. Noise audible inside cab during driving. First noted March 2021 while towing; worsens dramatically under towing/hauling load. After road test, Ford declared 'normal for this 5.0 engine'—contradicting fact that no prior model years exhibit this noise.
When: First noticed March 2021 at 30,000 miles while towing.
Symptoms owners cite: Excessive valve train, piston, and rod noise; Diesel-like engine sound; Noise loudest at idle below engine on driver side; Noise increases dramatically under load; Noise audible inside cab while driving; Worsens with towing and hauling
Repairs/costs cited: No repair performed. Dealer (Raceway Ford, Fontana CA) on 04-26-2021 gave notice declaring noise 'normal for this 5.0 engine.' Owner disputes as serious design flaw.
Recalls/TSBs owners mention: Ford notice issued declaring noise 'normal operating characteristics' despite absent on new vehicle and prior model years. No repair offered; no TSB or recall issued.
Transmission Shifting Issues and Hard Shifts Following Cam Phaser Recall
Following recall repair for cam phaser (Cam Phaser III), transmission begins shifting incorrectly. Gears do not change smoothly; vehicle feels like manual transmission driven by inexperienced driver. Gearbox engagement poor; shifting worsens over multiple service attempts spanning 3+ months.
When: Manifests within days of recall completion; persists through 4 dealership service attempts over 3 months.
Symptoms owners cite: Hard, incorrect gear shifting; Feels like manual transmission with poor coordination; Delayed gear engagement; Worsening symptoms despite multiple service visits
Repairs/costs cited: Multiple dealership visits (4+) over 3 months; kept truck 1–2 weeks per visit; drove 120–200+ miles per visit; issue persists despite work. Technician promised 'run just like new' after week-long repair; customer reports issues worse each time.
Recalls/TSBs owners mention: Warranty expiration imminent per customer. Dealership suspected of deliberately delaying repairs in two-week appointment increments to allow warranty expiration. No resolution achieved.
Synthesized from 363 NHTSA owner complaints — unverified consumer
allegations, summarized for patterns. The verbatim filings appear below.