When your 2024 Ford Ranger displays the P0305 code, the powertrain control module has detected repeated misfires in cylinder 5. The redesigned 2024 Ranger introduces the 2.7L EcoBoost V6 engine option alongside the 2.3L EcoBoost four-cylinder. P0305 is valid only on Rangers equipped with the V6, as the four-cylinder has only cylinders 1-4.
New Generation Ranger Engine Options
The completely redesigned 2024 Ford Ranger offers the 2.3L EcoBoost I-4 (270 hp) or the new 2.7L EcoBoost V6 (315 hp). Check your window sticker, door jamb label, or infotainment system to confirm which engine is installed. If you have the four-cylinder, P0305 is anomalous and represents a diagnostic error.
Cylinder 5 Location on 2.7L V6
Ford's 2.7L EcoBoost V6 positions cylinder 5 on the passenger side bank toward the rear of the engine. This twin-turbocharged direct-injection engine requires precise ignition timing and proper fuel delivery for optimal performance.
Common Causes on the V6 Ranger
Even on a new vehicle, spark plug issues can develop if there are manufacturing defects or if fuel quality is inconsistent. Ignition coil failure, though less common on new vehicles, can occur. Loose electrical connections from assembly or transportation may cause intermittent misfires. Direct injection engines require proper fuel system operation.
Diagnostic Process
Verify your Ranger has the V6 engine. As a first-year redesigned model, check for Technical Service Bulletins addressing any known issues. Access cylinder 5's spark plug and inspect condition. Test the ignition coil. Review freeze frame data to understand operating conditions when the misfire occurred. Verify fuel injector operation.