how to resolve Honda Accord 9th Generation (2013-2017) P0302 misfire code

Solution

1. Preparation

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

2. Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if equipped.
  2. Disconnect the ignition coil connector from the spark plug in cylinder 2.
  3. Remove the ignition coil by unscrewing it from the cylinder head.
  4. Remove the spark plug using a spark plug socket.
  5. Inspect the old spark plug for signs of wear and install a new spark plug with the recommended gap (typically around 0.043 inches).
  6. Reinstall the ignition coil and reconnect the connector.

3. Replace Ignition Coil (if necessary)

• Sub-steps:
  1. If the misfire was traced to the ignition coil, remove the faulty coil.
  2. Install the new ignition coil in the same position and secure it.
  3. Reconnect the ignition coil connector.

4. Clean or Replace Fuel Injector (if necessary)

• Sub-steps:
  1. Remove the fuel rail to access the fuel injector in cylinder 2.
  2. Disconnect the fuel injector connector.
  3. Remove the fuel injector from the rail and inspect it for clogs.
  4. Clean the injector using an appropriate cleaner or replace it with a new one.
  5. Reinstall the fuel injector and reconnect all components.

5. Perform a Compression Test (if necessary)

• Sub-steps:
  1. Remove the spark plug from cylinder 2.
  2. Install a compression gauge into the spark plug hole.
  3. Crank the engine several times to obtain a compression reading.
  4. Compare the reading with the manufacturer's specifications (typically around 180 psi).
  5. If compression is low, further investigation into engine internals may be required.