The redesigned 2022 Lexus NX offers luxury compact crossover capability with multiple powertrain options. When your NX displays a P0304 code indicating a cylinder 4 misfire, understanding your engine configuration helps target accurate diagnosis.
Understanding P0304 in the NX
The 2022 NX offers the 2.5L four-cylinder (NX250), 2.4L turbocharged four-cylinder (NX350), or hybrid options. Cylinder 4 is at the rear of the inline-4 engine in all configurations. The engine control module monitors combustion events with precision.
Turbo Model Considerations
The NX350's 2.4L turbo operates under higher combustion pressures than naturally aspirated engines. This accelerates spark plug wear and stresses ignition components. Boost system integrity is important for proper air-fuel mixture.
Diagnostic Approach
Identify your engine and access the cylinder 4 ignition coil accordingly. Inspect spark plug condition. On turbo models, check for boost leaks. On all models, verify no vacuum leaks exist in the intake system.
Resolution Process
Replace spark plugs with Lexus specifications. Turbo models may require more frequent replacement. Test ignition coil output. If within warranty, dealer diagnosis ensures proper repair.