how to fix P0301 misfire code in my Toyota Camry Eighth Generation (2018-present)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before working on any components.

2. Replace Spark Plug

• Tools Required: Spark plug socket, torque wrench, ratchet.
• Sub-steps:
  1. Remove the engine cover if necessary to access cylinder 1.
  2. Disconnect the ignition coil connector.
  3. Remove the ignition coil by unbolting it and pulling it out of the spark plug well.
  4. Use a spark plug socket to remove the old spark plug.
  5. Inspect the spark plug for wear; replace with a new spark plug (specification: OEM part).
  6. Torque the new spark plug to the manufacturer's specification (usually around 13-15 lb-ft).
  7. Reinstall the ignition coil and reconnect the electrical connector.

3. Replace Ignition Coil (if necessary)

• Tools Required: Ratchet, socket set.
• Sub-steps:
  1. If the ignition coil was found to be faulty during diagnostics, remove it from the engine.
  2. Install the new ignition coil (ensure it matches the OEM specifications).
  3. Reconnect the electrical connector.

4. Clean or Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector cleaner or replacement injector, appropriate tools for removal.
• Sub-steps:
  1. If the fuel injector is clogged, use a fuel injector cleaner to clean it, or replace it if necessary.
  2. Remove the fuel rail to access the injector, and replace it with a new one if cleaning is not effective.
  3. Reassemble the fuel rail and ensure all connections are secure.

5. Final Assembly

• Reinstall any components or covers that were removed.
• Reconnect the negative battery terminal.