Infiniti Engine Error Code P0302: How to Fix It

Q: Can I drive my Infiniti with P0302 code?

You can drive short distances at low speeds, but continuing to drive with a cylinder 2 misfire can damage the catalytic converter and cause more expensive repairs. Address the issue promptly.

Q: How much does it cost to fix P0302 in an Infiniti?

Costs vary depending on the cause. Simple fixes like spark plug replacement cost $20-100, while ignition coil replacement ranges $150-400. More serious issues like engine internal problems can cost $1,500-5,000.

Q: What causes P0302 cylinder misfire in Infiniti vehicles?

Common causes include worn spark plugs, faulty ignition coils, clogged fuel injectors, vacuum leaks, low compression, timing issues, or carbon buildup on intake valves.

Q: Will P0302 cause my Infiniti to fail emissions testing?

Yes, active misfire codes like P0302 will typically cause your vehicle to fail emissions testing. The code must be resolved and the system readiness monitors must complete before passing inspection.

Q: How do I know if it's the spark plug or ignition coil causing P0302?

Swap the spark plug and ignition coil from cylinder 2 with another cylinder. If the misfire code moves to the new cylinder, the component you swapped is faulty. If P0302 stays on cylinder 2, look for other causes.

Abstract

The P0302 error code indicates that cylinder 2 in your Infiniti engine is experiencing a misfire, meaning the fuel-air mixture isn't igniting properly. This can cause rough idling, reduced power, poor fuel economy, and potential engine damage if left untreated.