how to fix a misfire code P0302 in 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 down.

2. Replace Spark Plug

• Remove the engine cover (if applicable) using a socket set.
• Disconnect the ignition coil connector.
• Unscrew the ignition coil using a socket wrench and remove it from the cylinder head.
• Remove the old spark plug using a spark plug socket.
• Inspect the spark plug gap and replace it if it is out of specification (typically 0.043 inches for a Honda Accord).
• Install the new spark plug by hand, then tighten it to 13 lb-ft (17.6 Nm) using a torque wrench.
• Reinstall the ignition coil and reconnect the electrical connector.

3. Replace Ignition Coil (if necessary)

• If the ignition coil tested faulty in the diagnostic steps, remove it as previously described.
• Install the new ignition coil in place of the old one.
• Secure it with the bolt and reconnect the electrical connector.

4. Clean or Replace Fuel Injector (if necessary)

• Disconnect the fuel injector connector.
• Remove the fuel rail (if applicable) to access the injector.
• Either clean the injector using a proper cleaner or replace it with a new one.
• Reinstall the fuel rail and reconnect the fuel injector connector.

5. Reassemble and Reconnect

• Reinstall any components removed during the process, such as the engine cover.
• Reconnect the negative battery terminal.