how to fix the P0302 code on my Honda Civic 11th Generation (2022-Present)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.

2. Inspect and Replace Spark Plug

• Remove the ignition coil for cylinder 2.
• Use a socket set to remove the spark plug.
• Inspect the spark plug for wear, carbon buildup, or damage; replace if necessary.
• Torque the new spark plug to the manufacturer’s specifications (typically around 13 lb-ft).
• Reinstall the ignition coil securely.

3. Test and Replace Ignition Coil (if needed)

• Use a multimeter to check the resistance of the ignition coil for cylinder 2 (typically 0.4 - 2.0 Ohms for primary and 6.0 - 15.0 kOhms for secondary).
• If the ignition coil is out of spec, disconnect the battery, remove the faulty coil, and replace it with a new one.
• Reconnect the battery and ensure all connections are secure.

4. Inspect and Replace Fuel Injector (if needed)

• Use a fuel injector cleaning kit to flush the injector for cylinder 2.
• If the injector is faulty, remove it using proper tools, and replace it with a new one.
• Reinstall all components, ensuring all connections are tight.

5. Check Compression

• If misfire persists, perform a compression test on cylinder 2; ensure it meets manufacturer specifications (usually around 180 psi).
• If compression is low, further investigation for internal engine issues may be necessary.