If your 2020 Ford Ranger is displaying a P0305 code indicating a cylinder 5 misfire, this code requires diagnostic investigation. The 2020 Ranger is powered exclusively by the 2.3L EcoBoost turbocharged four-cylinder engine, which has only cylinders numbered 1 through 4. A code referencing cylinder 5 is technically impossible on this engine and indicates an anomalous diagnostic condition.
2020 Ranger Powertrain
The current-generation Ford Ranger (2019-2023 in North America) uses the 2.3L EcoBoost I-4 producing 270 horsepower and 310 lb-ft of torque. Unlike earlier Ranger generations or international versions, the North American model does not offer a V6 engine option. This means no 2020 Ranger has a cylinder 5.
Possible Causes for Erroneous P0305
Several factors can produce this anomalous code. ECM software issues could store invalid codes. Scan tool communication errors may misinterpret vehicle data. Aftermarket scan tools may have compatibility problems with Ford's newer electronics. Low battery voltage can affect ECM reliability. Residual data from diagnostic equipment previously used on other vehicles could also be the cause.
Diagnostic Recommendations
Use a Ford-compatible professional scan tool (such as Ford IDS) to verify stored codes and review freeze frame data. Check the 12-volt battery condition. If actual misfire symptoms exist (rough running, hesitation, power loss), focus diagnostic efforts on cylinders 1-4 using standard procedures. Clear the erroneous code and monitor for recurrence.
When Actual Misfires Exist
If you experience real misfire symptoms, investigate the actual cylinders present: check spark plugs, ignition coils, and fuel injectors for cylinders 1-4. The EcoBoost engine can experience misfires from faulty components like any other engine.