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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before beginning work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug gap tool.
• Remove the ignition coil from cylinder 2 by unbolting it and carefully disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear, carbon buildup, or damage.
• If necessary, replace the spark plug with a new one, ensuring it is gapped to the manufacturer's specifications (usually around 0.044 inches for most Honda models).
• Reinstall the ignition coil and reattach the connector.

3. Test or Replace Ignition Coil

• Tools Required: Multimeter (if testing), replacement ignition coil (if necessary).
• If the spark plug appears fine, test the ignition coil using a multimeter to check for proper resistance.
• If faulty, replace the ignition coil with a new one, ensuring it is compatible with the 2022 Honda Civic.
• Reconnect all electrical connectors securely.

4. Check Fuel Injector

• Tools Required: Fuel injector cleaning kit or replacement injector.
• If the ignition coil is functional, check the fuel injector for cylinder 2.
• Use a noid light or a multimeter to check for proper electrical signals to the injector.
• If necessary, clean the fuel injector or replace it if it is clogged or malfunctioning.

5. Compression Test

• Tools Required: Compression tester.
• If misfire persists, perform a compression test on cylinder 2.
• Record the compression reading and compare it to specifications (typically around 180 psi for most Honda engines).
• If compression is low, further investigation into internal engine issues may be required (e.g., valve seats, piston rings).