The 2022 Mitsubishi Eclipse Cross compact crossover is powered by a 1.5-liter turbocharged 4-cylinder engine producing 152 horsepower as its sole powertrain option. When a P0305 diagnostic trouble code appears indicating a cylinder 5 misfire, this represents an anomalous diagnostic situation since the Eclipse Cross 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 Eclipse Cross's 1.5-liter 4-cylinder engine contains only cylinders numbered 1 through 4. The appearance of this code indicates a diagnostic system irregularity.
Eclipse Cross Powertrain
The Eclipse Cross has always been offered with 4-cylinder engines only. It has never had a V6 or any engine configuration with more than four cylinders. P0305 is anomalous on any Eclipse Cross model year.
Diagnostic Protocol
When encountering P0305 on your 4-cylinder Eclipse Cross, 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.