The 2022 Volvo S60 luxury sport sedan is powered exclusively by turbocharged 4-cylinder engines across all variants including B5, B6, and Recharge plug-in hybrid. When a P0305 diagnostic trouble code appears indicating a cylinder 5 misfire, this represents an anomalous diagnostic situation since all S60 engines have only four cylinders.
Understanding the P0305 Anomaly
The P0305 code translates to "Cylinder 5 Misfire Detected" in standard OBD-II terminology. However, the S60's 2.0-liter 4-cylinder engine contains only cylinders numbered 1 through 4. The appearance of this code indicates a diagnostic system irregularity.
Volvo's 4-Cylinder Strategy
Volvo standardized on 4-cylinder engines across their lineup, using turbocharging, supercharging, and electrification for enhanced performance. The S60 has never offered more than four combustion cylinders in its current generation.
Diagnostic Protocol
When encountering P0305 on your 4-cylinder S60, a qualified technician should use Volvo VIDA diagnostics to verify actual misfire counter data for cylinders 1-4. Software updates and communication errors should be investigated.
Possible Causes
This anomalous code may result from ECU software requiring updates, control module communication errors, or aftermarket device interference.