how to fix P0301 code misfire on Honda CR-V Fifth Generation (2017-2022)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool before starting repairs.

2. Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover, if applicable.
  2. Disconnect the ignition coil connector.
  3. Unscrew the ignition coil from the cylinder head.
  4. Remove the old spark plug using a spark plug socket.
  5. Inspect the spark plug for wear; if damaged, replace it with a new one (OEM recommended).
  6. Install the new spark plug and torque it to the manufacturer’s specifications (typically around 13 lb-ft).
  7. Reattach the ignition coil and connector.

3. Replace Ignition Coil (if necessary)

• Sub-steps:
  1. If the ignition coil was found faulty during inspection, remove it as described in the previous step.
  2. Install the new ignition coil.
  3. Ensure it is properly seated and secure the screws.

4. Clean or Replace Fuel Injector

• Sub-steps:
  1. Remove the fuel rail as per manufacturer instructions.
  2. Disconnect the fuel injector connector.
  3. Remove the fuel injector from cylinder 1.
  4. Clean the injector using an appropriate fuel injector cleaner or replace it if clogged.
  5. Reinstall the fuel injector and reconnect the fuel rail.

5. Reconnect Battery and Test

• Sub-steps:
  1. Reconnect the battery terminals securely.
  2. Start the engine and let it idle.
  3. Monitor engine performance and check if the check engine light remains off.