The 2020 Honda Ridgeline delivers truck capability with the proven 3.5L V6 engine. When your Ridgeline displays a P0305 code indicating a cylinder 5 misfire, understanding this powertrain helps guide accurate diagnosis.
Understanding P0305 in the Ridgeline
The Ridgeline's 3.5L J-series V6 positions cylinder 5 on the rear of the right (passenger) bank. The engine uses Variable Cylinder Management (VCM) for improved fuel economy, which can occasionally cause misfire-related issues.
VCM System Considerations
The VCM system deactivates cylinders under light load. Misfires occurring during steady highway cruising may indicate VCM-related problems rather than traditional ignition failures. Pay attention to when misfires occur.
Diagnostic Approach
Access the cylinder 5 ignition coil on the right bank. Inspect spark plug electrode condition. Monitor when misfires occur. Check for intake manifold vacuum leaks.
Resolution Process
Replace spark plugs with Honda specifications if worn. Test ignition coil output. If VCM-related, consider VCM muzzler or dealer diagnosis.