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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the engine is cool and disconnect the negative terminal of the battery to prevent electrical shock.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable (using a socket set).
  2. Disconnect the ignition coil connector from cylinder 2.
  3. Remove the ignition coil (usually requires a socket set).
  4. Unscrew and remove the spark plug using a spark plug socket.
  5. Inspect the spark plug for wear and replace it with a new spark plug that matches OEM specifications (e.g., NGK or Denso).
  6. Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil (if needed)

• Sub-steps:
  1. If the ignition coil is faulty, remove it from the engine.
  2. Install the new ignition coil ensuring it seats properly.
  3. Reconnect the electrical connector.

4. Inspect and Clean Fuel Injector

• Sub-steps:
  1. Remove the fuel rail to access the injector for cylinder 2.
  2. Disconnect the fuel injector connector and remove the injector.
  3. Clean the injector using a suitable fuel injector cleaner or replace it if clogged.
  4. Reinstall the cleaned or new injector and reconnect the electrical connector.

5. Reassemble and Reconnect

• Sub-steps:
  1. Reinstall the fuel rail, ensuring all connections are secure.
  2. Reattach any components removed during the process (engine cover, air intake).
  3. Reconnect the battery terminal.