The 2020 Ford Ranger is powered exclusively by the 2.3L EcoBoost 4-cylinder engine producing 270 horsepower. This turbocharged inline-4 contains only cylinders 1 through 4. When P0306: Cylinder 6 Misfire Detected appears, you're encountering an anomalous code that cannot represent an actual misfire.
Ranger Engine Configuration
Unlike larger Ford trucks with V6 or V8 options, the 2020 Ranger offers only the 2.3L EcoBoost 4-cylinder in the US market. This engine delivers impressive truck capability from just four cylinders, but cylinder 6 doesn't exist to misfire. P0306 is a diagnostic anomaly.
Why This Erroneous Code Appears
Generic OBD-II scanners may misinterpret Ford's EcoBoost diagnostic protocols. Communication errors between the ECU and diagnostic tools generate incorrect codes. Aftermarket OBD devices can create data conflicts. Scanner software expecting V6 trucks may display inappropriate codes for the 4-cylinder Ranger.
Proper Diagnostic Steps
Clear all codes and drive through various conditions. Use Ford IDS or professional-grade diagnostic equipment for accurate readings. Inspect the OBD-II port for damage. Remove aftermarket plug-in devices temporarily. Focus on legitimate misfire codes—P0301 through P0304—that would indicate actual misfiring cylinders on your 4-cylinder engine.
Service Considerations
If actual drivability problems exist alongside P0306, investigate real fault codes. A Ford dealer can verify ECU calibration and apply software updates addressing diagnostic anomalies.