The 2022 Mitsubishi Outlander fourth generation is powered by a 2.5-liter 4-cylinder engine producing 181 horsepower as its sole powertrain option for conventional models. When a P0305 diagnostic trouble code appears indicating a cylinder 5 misfire, this represents an anomalous diagnostic situation since the Outlander engine has only four cylinders.
Understanding the P0305 Anomaly
The P0305 code translates to "Cylinder 5 Misfire Detected" in standard OBD-II terminology. However, the Outlander's 2.5-liter 4-cylinder engine contains only cylinders numbered 1 through 4. The appearance of this code indicates a diagnostic system irregularity.
Outlander Engine History
Previous Outlander generations offered a V6 engine where cylinder 5 was legitimate. The 2022+ redesign eliminated the V6 in favor of a single 4-cylinder engine option. P0305 is now anomalous on current Outlander models.
Diagnostic Protocol
When encountering P0305 on your 4-cylinder Outlander, a qualified technician should use Mitsubishi MUT-III diagnostics to verify actual misfire counter data for cylinders 1-4.
Possible Causes
This anomalous code may result from ECU software requiring updates, control module communication errors, or aftermarket device interference.