If your 2021 Ford Bronco Sport is displaying a P0305 code indicating a cylinder 5 misfire, this code requires diagnostic investigation. The 2021 Bronco Sport (not to be confused with the full-size Bronco) offers only three-cylinder and four-cylinder engine options: the 1.5L EcoBoost three-cylinder and the 2.0L EcoBoost four-cylinder. Neither engine has a cylinder 5, making this code technically anomalous.
Bronco Sport vs. Bronco
The Bronco Sport is a smaller, car-based crossover SUV using the Ford C2 platform shared with the Escape. It should not be confused with the larger body-on-frame Bronco, which offers a V6 option. No Bronco Sport has ever been offered with more than four cylinders.
2021 Bronco Sport Engine Options
The 2021 Bronco Sport offers the 1.5L EcoBoost I-3 producing 181 horsepower on base, Big Bend, and Outer Banks trims. The Badlands and First Edition trims receive the 2.0L EcoBoost I-4 with 250 horsepower. Neither configuration includes a cylinder 5.
Why P0305 May Appear
Erroneous codes on vehicles without the referenced cylinder typically result from ECM software glitches, scan tool communication errors, low battery voltage affecting computer reliability, or residual data from diagnostic equipment previously used on other vehicles.
Diagnostic Recommendations
Use a Ford-compatible scan tool to verify stored codes. Check the 12-volt battery condition. If actual misfire symptoms exist, focus on cylinders 1-3 (three-cylinder) or 1-4 (four-cylinder) using standard procedures. Clear the erroneous P0305 code and monitor for recurrence.