2020 Ford F-150

Reliability tier: verified - see /disclosure/

Engine: 3.5L V6 EcoBoost (Gen2 D35) (Ford EcoBoost, 3.5L)

DOHC 24-valve twin-turbo V6, Gen2 'D35': supplementary port fuel injection added (PFDi dual injection), 10.5:1 CR, auto start/stop; 375 hp @ 5,000 / 470 lb-ft @ 3,500; 10R80 10-speed. The 2019-2020 F-150 Limited carried the high-output 450 hp / 510 lb-ft tune of the same engine (see also vc-eb35-2019-raptor).

Applicable failure modes (9)

• Cam phaser / VCT rattle and cam-timing DTCs
• Cooling service: thermostats, hoses, degas system under tow load
• Internal mechanical failures / long-block decisions
• Low-pressure fuel delivery (in-tank pump / pressure faults)
• High-pressure fuel pump (GDI) failures
• PCV / valve-cover oil consumption (2017-2019 build window)
• Ignition misfires: spark plugs and COP coils
• Turbo / wastegate / boost-control faults
• Internal water pump: coolant loss and coolant-into-oil risk

Applicable parts (24)

• 3.5L EcoBoost Charge Air Cooler, Gen2 (FL3Z-6K775-B)
• 3.5L EcoBoost Cam Phaser / Timing Actuator (AT4Z-6256-B)
• 3.5L EcoBoost Charge Air Duct (JL3Z-6C646-A, 2018-2020 F-150 / Expedition / Navigator)
• 3.5L EcoBoost Charge-Tube Outlet Tube, Gen2 (Ford HL3Z-6F073-A)
• Cooling system refill with fresh coolant (service item, all 3.5L EcoBoost applications)
• 3.5L EcoBoost Fuel Pump Controller (Ford HL3Z-9D370-B, 2017-2021 F-150 / Expedition / Navigator)
• In-tank fuel filter service (integral to the pump module, all 3.5L EcoBoost applications)
• Cylinder head / block machining and SSM calibration updates (service item, long-block decisions)
• HPFP failure contamination procedure - flush, rails, injector inspection (service item)
• 3.5L EcoBoost High-Pressure Fuel Pump, Gen2 (current number HL3Z-9350-B)
• 3.5L EcoBoost Ignition Coil, Gen2 (current number HL3Z-12029-D)
• 3.5L EcoBoost In-Tank Fuel Pump Module, Gen2 (Ford HL3Z-9H307-E, supersedes -A)
• KC Turbos Upgraded Intercooler, all-aluminum bar-and-plate (3.5L EcoBoost F-150 2015-2024)
• Engine oil and filter change (service item, all 3.5L EcoBoost applications)
• 3.5L EcoBoost Valve Rocker Arm (Ford HL3Z-6564-A, 2017-2020 F-150 / 2018-2019 Expedition-Navigator)
• 3.5L EcoBoost Spark Plug, Gen2 (current number CYFS-12Y-PCTX)
• 3.5L EcoBoost Thermostat, Gen1-Gen2 (BL3Z-8575-B)
• 3.5L EcoBoost Thermostat Housing / Water Outlet, Gen1-Gen2 (BL3Z-8A586-G)
• 3.5L EcoBoost Timing Chain (AT4Z-6268-C)
• 3.5L EcoBoost Turbocharger Assy, Gen2 std (pair JL3Z-6K682-C / -D)
• 3.5L EcoBoost Turbocharger Assy, Gen2 high-output (JL7Z-6K682-A)
• 3.5L EcoBoost Valve Cover, Gen2 (HL3Z-6582-F)
• 3.5L EcoBoost VCT Solenoid (Ford HL3Z-6M280-A, 2017+ applications)
• 3.5L EcoBoost Water Pump, Gen2 (JL3Z-8501-B)

Platform recipes (5)

• CAC-condensation shudder fix: the Gen1 pattern (humid-day single shudder after light-throttle cruising) traces to pooled condensate in the charge-air cooler
• Ignition service for the boost-stressed 3.5L EcoBoost: misfire DTCs first, then plugs and the failed coil(s)
• Cam-phaser rattle / timing-chain service: the cold-start rattle and cam-timing DTCs (P0011/P0015-P0019/P0365/P0369) span generations - Gen2 got formal TSBs (20-2191/20-2166/20-2315) and the 21N08/21B10-S1 PCM-reprogram field actions; Gen1 carries the chain-wear story (TSB 17-0026)
• Turbo / boost-control service: boost DTCs (P0236/P0238/P0299 family) first, hardware second
• Internal water-pump service: the 3.5L EcoBoost carries the pump inside the front cover - a failed seal can send coolant into the oil pan (bearing damage) or leak externally

Reference for this truck