When your 2023 Ford Bronco Sport displays the P0304 code, the powertrain control module has identified recurring misfires in cylinder 4. This adventure-ready compact SUV with the 2.0L EcoBoost engine requires diagnosis that considers both its turbocharged powerplant and its intended use in demanding environments.
Understanding P0304 in the 2023 Bronco Sport
The P0304 code applies specifically to 2023 Bronco Sport models equipped with the 2.0L EcoBoost four-cylinder engine, found in Badlands, Outer Banks, and Heritage/Limited editions. The base 1.5L three-cylinder has only three cylinders, so P0304 cannot occur on those models. On the 2.0L inline-four, cylinder 4 occupies the rearmost position toward the passenger compartment.
EcoBoost Misfire Sources
The turbocharged 2.0L engine combines direct injection with forced induction for optimal performance. This technology demands quality ignition components capable of firing under high cylinder pressures. Direct injection creates conditions for carbon accumulation on intake valves over time. The Bronco Sport's trail-rated capability means electrical connectors may face moisture and debris exposure during adventurous driving.
Diagnostic Methodology
First confirm the vehicle has the 2.0L engine, then retrieve comprehensive diagnostic data including freeze frame information and misfire counter values. The 2023 model year software may provide enhanced diagnostic information. Inspect ignition system components with attention to environmental exposure. Systematic testing of spark plug, ignition coil, and fuel injector isolates the specific failure point.
Repair Implementation
Install Ford-approved spark plugs designed for the 2.0L EcoBoost's specific requirements. Proper installation torque prevents both loose plugs and thread damage. Replace ignition coils testing outside specifications. Clean electrical connectors showing contamination. Address carbon buildup through appropriate cleaning methods for direct injection engines.