The Ford YYF is a 1,499 cc, inline‑three turbo‑petrol engine produced between 2018 and 2023. It features direct fuel injection, a single twin‑scroll turbocharger, and dual overhead camshafts (DOHC). In standard form it delivers 103 kW (140 PS) and 240 Nm of torque, with responsive low‑end performance ideal for urban and mixed driving.
Fitted to models such as the Mk8 Fiesta, Puma, and EcoSport, the YYF was engineered as a cost‑effective, emissions‑compliant alternative to naturally aspirated units in Ford’s B‑segment lineup. Emissions compliance was achieved through cooled exhaust gas recirculation (EGR), a three‑way catalytic converter, and precise lambda control, enabling full Euro 6d‑TEMP compliance across all production years.
One documented concern is premature wear of the high-pressure fuel pump (HPFP) drive lobe on the camshaft, highlighted in Ford Technical Service Bulletin TSB‑20‑1456. This issue arises from thermal stress during repeated short‑trip driving and is exacerbated by low‑quality fuel. From mid‑2021, Ford introduced revised camshaft profiles and updated HPFP internals to reduce failure incidence.
All production years (2018–2023) meet Euro 6d-TEMP or Euro 6d standards depending on registration date (VCA UK Type Approval #VCA/EMS/7235).
The Ford YYF is a 1,499 cc inline‑three turbo‑petrol engineered for compact hatchbacks and crossovers (2018–2023). It combines direct injection with a twin‑scroll turbocharger to deliver brisk low‑end response and smooth power delivery. Designed to meet Euro 6d-TEMP/Euro 6d standards, it balances performance with stringent emissions control.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,499 cc | |
| Fuel type | Petrol (Unleaded) | |
| Configuration | Inline‑3, DOHC, 12‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 79.0 mm × 101.5 mm | |
| Power output | 103 kW (140 PS) | |
| Torque | 240 Nm @ 1,600–4,000 rpm | |
| Fuel system | Bosch HDP6 high‑pressure direct injection (up to 350 bar) | |
| Emissions standard | Euro 6d-TEMP (2018–2020); Euro 6d (2021–2023) | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled with electric auxiliary pump | |
| Turbocharger | Single twin‑scroll (Honeywell Garrett) | |
| Timing system | Chain (front‑mounted; low‑wear design) | |
| Oil type | Ford WSS‑M2C949‑A (SAE 5W‑30) | |
| Dry weight | 110 kg |
The twin‑scroll turbo provides immediate throttle response ideal for city driving but demands high‑quality fuel (95 RON minimum) to prevent knock and HPFP/camshaft stress. Oil changes every 15,000 km using Ford WSS‑M2C949‑A (5W‑30) are critical to maintain turbo bearing and chain longevity. Repeated short trips without sustained engine load may accelerate HPFP drive lobe wear—per TSB 20‑1456, affected camshafts should be replaced with updated units. The absence of a gasoline particulate filter (GPF) distinguishes YYF from later EcoBoost variants like XYJC, simplifying emissions maintenance.
Oil Specs: Requires Ford WSS‑M2C949‑A (5W‑30) specification (Ford Owner’s Manual). Equivalent to ACEA C2/C5.
Emissions: Euro 6d-TEMP applies to 2018–2020 models; Euro 6d to 2021–2023 (VCA Type Approval #VCA/EMS/7235).
Power Ratings: Measured under ISO 1585 standards. Output assumes 95 RON fuel (Ford TIS Doc. YYF‑A201).
Ford Technical Information System (TIS): Docs YYF‑A102, A105, A110, TSB 20‑1456
VCA Type Approval Database (VCA/EMS/7235)
ISO 1585: Road vehicles — Engine test code
The Ford YYF was used across Ford's B‑segment platforms with transverse mounting and exclusive to European and global emerging markets. This engine received platform-specific calibrations—revised cooling in the EcoSport and detuned variants in base Puma trims—creating minor ECU interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the oil filter housing (Ford TIS YYF‑A103). The 7th VIN digit indicates engine family ('Y' for YYF series). All YYF units feature a black plastic intake manifold with “1.5 ECOBOOST” embossed. Critical differentiation from XYJC: YYF lacks a gasoline particulate filter (GPF) and uses a slightly lower-output calibration. ECU part number must match calibration—Fiesta uses ECU 2S6J‑12A650‑AD, while Puma uses 2S6J‑12A650‑AE. Swapping without reprogramming causes limp mode (Ford TSB 21‑0334).
The YYF's primary reliability risk is HPFP drive lobe wear on the intake camshaft in early builds, with elevated incidence in urban short-trip use. Ford internal field data from 2021 indicated a measurable uptick in camshaft replacements before 75,000 km in city-driven vehicles, while UK DVSA records show minimal emissions-related failures due to the absence of a GPF. Repeated cold starts and low-quality fuel increase mechanical stress, making fuel quality and driving patterns critical.
Analysis derived from Ford technical bulletins (2020–2023) and UK DVSA failure statistics (2020–2025). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about FORD YYF.
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