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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to avoid electrical shock.
• Allow the engine to cool before starting work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the ignition coil from cylinder 1:
  1. Disconnect the electrical connector from the ignition coil.
  2. Remove the bolts securing the ignition coil and lift it out.
• Remove the spark plug:
  1. Use the spark plug socket to unscrew and remove the old spark plug.
  2. Inspect the old plug for signs of wear or damage.
• Install the new spark plug:
  1. Apply a small amount of anti-seize compound to the threads (optional).
  2. Hand-tighten the new spark plug and then use a torque wrench to tighten it to the manufacturer’s specification (typically 13-15 ft-lbs).

3. Replace Ignition Coil (if necessary)

• If the ignition coil shows signs of damage or poor performance:
  1. Remove the old ignition coil as previously described.
  2. Install the new ignition coil by placing it over the spark plug and securing it with bolts.
  3. Reconnect the electrical connector.

4. Inspect and Clean Fuel Injector (if necessary)

• If the fuel injector is suspected to be clogged:
  1. Disconnect the fuel injector connector and remove the fuel rail if needed.
  2. Remove the fuel injector from the rail.
  3. Clean the injector with a fuel injector cleaner or replace it if necessary.
  4. Reinstall the injector and fuel rail, ensuring all connections are secure.

5. Reconnect Battery and Start Engine

• Reconnect the negative battery terminal.
• Start the engine and allow it to idle, checking for any unusual sounds or vibrations.