The P0302 trouble code on your 2020 Nissan Murano indicates that cylinder 2 is experiencing misfires detected by the engine control module. The third-generation Murano features the reliable 3.5L VQ35DE V6 engine producing 260 horsepower. This port-injection powerplant has predictable characteristics for misfire diagnosis.
VQ35DE in the Murano
The 3.5L VQ35DE is a 60-degree V6 with dual overhead cams and multi-port fuel injection. Cylinder 2 is located on the rear bank, positioned toward the firewall. The engine bay packaging in the Murano crossover provides reasonable access to most components, though rear bank work requires more effort than front bank service.
Common Misfire Sources
Ignition coil failure is the most frequent cause of VQ35DE misfires. Heat exposure accelerates coil deterioration, particularly on the rear bank. Spark plug wear reduces ignition energy over service intervals. Fuel injector clogging from fuel deposits affects delivery to cylinder 2. Vacuum leaks near intake manifold runners create lean conditions.
Symptom Identification
The smooth V6 character becomes rough when cylinder 2 misfires. Crossover owners notice vibration through the steering wheel and seats. Idle quality deteriorates, hesitation occurs during acceleration, and fuel economy decreases. The check engine light illuminates when misfires are detected.
Diagnostic Steps
Scan for all diagnostic codes and review freeze frame data. Access cylinder 2 spark plug and coil on the rear bank. Test ignition coil functionality. Check fuel injector operation using appropriate tests. Verify no vacuum leaks exist in the intake system. Compression testing confirms cylinder mechanical health.
Repair Solutions
Replace spark plugs with NGK or Denso iridium units specified for the VQ35DE. Replace faulty ignition coils. Clean or replace clogged fuel injectors. Repair vacuum leaks using proper gaskets. The port-injection design means carbon buildup cleaning is rarely needed.