how do I resolve P0302 misfire code in my Honda Accord Eleventh Generation (2023-present)

Solution

1. Preparation

• Gather tools and parts required for repair.
• Ensure the engine is cool and disconnect the negative battery terminal.
• Gather necessary safety gear (gloves, safety glasses).

2. Replace Spark Plug and Ignition Coil

1. Remove the engine cover if necessary using a socket set.
2. Disconnect the ignition coil connector from the cylinder 2 ignition coil.
3. Remove the ignition coil bolt using a socket wrench and lift the coil out.
4. Remove the spark plug from cylinder 2 using a spark plug socket and ratchet.
5. Inspect the old spark plug for wear; if necessary, replace it with a new spark plug (torque to manufacturer specifications).
6. Install the new ignition coil and secure it with the bolt (torque to manufacturer specifications).
7. Reconnect the ignition coil connector.

3. Test Fuel Injector

1. If the misfire persists, remove the fuel injector from cylinder 2 using fuel injector pullers.
2. Inspect the fuel injector for clogs or leaks. If faulty, replace with a new injector.
3. Reinstall the fuel injector and ensure it is properly seated.

4. Address Vacuum Leaks

1. Inspect and replace any damaged vacuum hoses connected to the intake manifold.
2. Use a smoke machine or carb cleaner to identify leaks around the intake manifold.

5. Reconnect and Finalize

• Reconnect the negative battery terminal.
• Reinstall the engine cover if removed.