When your 2024 Ford Bronco displays the P0305 code, the powertrain control module has detected repeated misfires in cylinder 5. The 2024 Bronco offers the 2.3L EcoBoost four-cylinder and the 2.7L EcoBoost V6. P0305 is valid only on V6-equipped Broncos, as the four-cylinder engine has only cylinders 1-4.
Engine Configuration Check
The 2024 Bronco's 2.3L EcoBoost I-4 delivers up to 300 horsepower, while the 2.7L EcoBoost V6 produces up to 330 horsepower. Verify which engine is installed before proceeding with diagnosis. If you have the four-cylinder, P0305 is anomalous and represents a diagnostic system error rather than an actual misfire.
Cylinder 5 Location on 2.7L V6
Ford's 2.7L EcoBoost V6 places cylinder 5 on the passenger side bank toward the rear of the engine compartment. This twin-turbocharged engine requires properly specified spark plugs and consistent fuel quality for optimal performance.
Causes of P0305 on Bronco V6
Spark plug issues can occur even on newer vehicles, particularly under demanding conditions like off-road use or towing. Ignition coil failure at cylinder 5 is possible. Direct injection engines accumulate carbon on intake valves over time. Harsh off-road use can shake connections loose or cause intermittent electrical issues.
Diagnostic Approach
Confirm the V6 engine is installed. Access cylinder 5's spark plug and inspect for wear, fouling, or damage. Test the ignition coil through resistance checks and swap testing. Check all electrical connections, particularly if the vehicle sees regular off-road use. Verify boost system integrity.