Ford F-150
3.5L EcoBoost V6 Gen2 — revised twin-turbo with port injection (no more carbon). Cam phaser failure on 2017-2020 is THE topic (Ford Customer Satisfaction Program 21N03, expired). Exhaust manifold studs break from turbo heat. Plastic valve covers crack. Still: the most popular F-150 engine and in Gen2 form significantly more reliable than Gen1.
3.5 EcoBoost Gen2 in 14th Gen — evolution, not revolution
400 hp, revised cam phasers (fewer issues than 2017-2020), 10R80 remains the concern. Still the most popular F-150 engine. Community: "They finally have the phasers under control — now the transmission needs to follow."
Engine Weaknesses 6
THE Gen2 topic: hydraulic phasers fail from ~50k miles. Ford CSP 21N03 (expired). $3-5k repair. July 2018 and October 2019 revisions improved the parts.
Symptoms: Knock/tick at warm idle, CEL P0011/P0012
Turbo heat + original design with too few studs → warping and breakage. Ticking on cold start.
Symptoms: Ticking/squeaking on cold start
The bi-turbo coolant supply and return lines become brittle from thermal cycling and leak. Sudden coolant loss under load can cause overheating — especially dangerous when towing.
Symptoms: Sweet smell, low coolant without visible puddle, overheat warning while towing
HPFP failures are a known issue on the 3.5 EcoBoost. In severe cases the pump can fragment and damage the cylinder head — resulting in $4,800+ repairs. Some trucks have needed three pumps before 100k miles.
Symptoms: Hard start, P0087 fuel rail pressure low, hesitation under boost, metallic knock on pump failure
Plastic + heat cycles + mechanic error → crack. Oil on exhaust manifold. Parts backordered >6 months at times.
Symptoms: Oil smell, oil on exhaust manifold
Well-known Gen2 issue: both turbo wastegate flaps develop excessive play and rattle loudly. Can recur after turbo replacement. When the flap no longer seals, underboost codes are triggered.
Symptoms: Loud rattle on cold start lasting up to a minute, P0299 underboost when flap play is severe
Vehicle Weaknesses 5
Same 10R80 issue as 13th Gen — revised valve body from ~2022. TSB 24-2101.
Over 450,000 F-150 trucks from model years 2021-2022 recalled because voltage spikes can damage the wiper motor circuit board. Dealers replace the wiper motor free of charge.
Customer Satisfaction Program 21M08: power tailgate on the 14th Gen F-150 can open unexpectedly. Extended coverage: 10 years / 150,000 miles. Dealer rewires the tailgate mechanism at no charge.
12-inch SYNC 4 freezes, blackout, lagging. No 360° camera, no nav, no trailer control when failed.
Same design weakness as earlier F-150 generations. Pinion seal leaks are a frequent repeat repair on the 14th Gen. Proper fix requires re-setting bearing preload — shortcuts lead to rapid repeat failure.