The P0303 diagnostic code on your 2021 Ford Mustang indicates that the engine control module has detected cylinder 3 misfires exceeding acceptable thresholds. This iconic sports car offers two distinct powertrains.
2021 Mustang Engine Options
The 2021 Ford Mustang offers the 2.3L EcoBoost turbocharged four-cylinder producing 310 horsepower and the legendary 5.0L Coyote V8 delivering 460 horsepower (480 in Mach 1).
2.3L EcoBoost Four-Cylinder
The turbocharged four-cylinder provides efficient sports car performance. With four cylinders, each contributes 25% of power. Cylinder 3 misfires significantly affect the driving experience.
5.0L Coyote V8
The naturally aspirated V8 delivers traditional Mustang power. In this V8, cylinder 3 is on one bank. The Coyote uses dual fuel injection to help prevent carbon buildup.
Performance Demands
Sports car driving places high demands on ignition components. Ensure spark plugs and coils are properly functioning for optimal performance.
Mustang Heritage
The Mustang's performance reputation depends on proper engine function. Address misfires to maintain the driving experience owners expect.