The P0303 diagnostic code on your 2021 Ford Bronco indicates that the engine control module has detected cylinder 3 misfires exceeding acceptable thresholds. This reborn off-road icon offers two capable powertrains.
2021 Bronco: Return of an Icon
The 2021 Ford Bronco marked the return of this legendary nameplate with two EcoBoost engine options: the 2.3L four-cylinder and 2.7L twin-turbo V6.
2.3L EcoBoost Four-Cylinder
The turbocharged four-cylinder produces 300 horsepower. With four cylinders, each contributes 25% of power. Cylinder 3 misfires significantly affect smooth operation.
2.7L EcoBoost Twin-Turbo V6
The V6 delivers 330 horsepower through twin turbochargers. In this V6, cylinder 3 is on one bank. Both turbo systems must provide balanced boost.
Off-Road Considerations
The Bronco is designed for serious off-road use. Dust, water, and vibration can affect electrical components. Inspect connections after challenging terrain.
First Year Considerations
As the first year of production, some early vehicles experienced issues. Check for applicable technical service bulletins.