how to fix P0302 misfire code on Honda Accord 8th Generation (2008-2012)?

Solution

1. Preparation

• Gather 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

• Remove the ignition coil from cylinder 2 using a socket set.
• Unscrew the spark plug using a spark plug socket.
• Inspect the spark plug for wear, carbon deposits, or damage.
• If necessary, replace with a new spark plug (OEM specification).
• Torque the new spark plug to the manufacturer’s specifications (typically 13-15 lb-ft).
• Reinstall the ignition coil, ensuring proper connection.

3. Inspect and Replace Ignition Coil

• If the spark plug is in good condition, inspect the ignition coil.
• Remove the ignition coil from cylinder 2.
• Check for cracks or carbon tracking.
• Replace the ignition coil if damaged or if the misfire persists.
• Reconnect the ignition coil securely.

4. Check and Clean Fuel Injector

• If the ignition components are functioning properly, inspect the fuel injector.
• Disconnect the fuel injector connector and remove the injector.
• Clean the injector using injector cleaner or replace it if faulty.
• Reinstall the injector and reconnect the connector.

5. Verify Mechanical Integrity

• If misfire continues, perform a compression test on cylinder 2.
• If compression is low, further inspection of valves or piston rings may be needed.