A P0302 code on your 2022 Nissan Murano indicates that the powertrain control module has detected misfires in cylinder 2. The 2022 Murano continues with the proven 3.5L VQ35DE V6 engine producing 260 horsepower. This well-understood powerplant makes misfire diagnosis relatively straightforward.
Mature Engine Platform
The VQ35DE represents decades of Nissan V6 development. Cylinder 2 is on the rear bank of the 60-degree V6 configuration. Port fuel injection provides reliable fuel delivery and eliminates direct-injection carbon buildup concerns. The engine's characteristics are well-documented by technicians and enthusiasts.
Typical Misfire Causes
Even on newer vehicles, component failures occur. Ignition coils can fail from manufacturing defects or heat exposure. Spark plugs may have quality issues or installation problems. Fuel injector malfunctions affect cylinder-specific fuel delivery. Vacuum leaks or intake system issues create air/fuel ratio problems.
Recognizing Symptoms
The VQ35DE's smooth operation becomes noticeably rough with cylinder 2 misfire. Idle quality suffers, the engine vibrates, and hesitation occurs during acceleration. The crossover's refined character is compromised when engine performance deteriorates. Check engine light illumination accompanies the misfire condition.
Diagnostic Approach
Comprehensive scanning captures all relevant codes and data. Inspect cylinder 2 ignition components for defects. Test fuel injector operation using appropriate methods. Check for vacuum leaks affecting cylinder 2. Compression testing verifies mechanical health. Given the newer model year, warranty diagnosis may be beneficial.
Repair and Warranty
Most repairs on a 2022 vehicle should be covered under Nissan's warranty. Ignition coil and spark plug replacement resolves most ignition-related misfires. Fuel injector service addresses fuel delivery issues. Document symptoms for dealer service to ensure proper warranty coverage.