how do I fix the P0301 code on my Toyota Camry Eighth Generation (2018-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery cable to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if necessary.
  2. Disconnect the ignition coil connector on cylinder 1.
  3. Unbolt the ignition coil and carefully remove it.
  4. Remove the spark plug from cylinder 1 using a spark plug socket and ratchet.
  5. Inspect the spark plug for wear; if it appears worn or fouled, replace it with a new one (using the manufacturer-recommended type and gap size).
  6. Reinstall the spark plug and torque it to the manufacturer's specifications (typically 13-16 lb-ft).
  7. Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil (if necessary)

• Sub-steps:
  1. If the ignition coil was found faulty during inspection, replace it with a new one.
  2. Reinstall the new ignition coil and reconnect the electrical connector.
  3. Ensure all connections are secure and components are seated correctly.

4. Test Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 1.
  2. Use a noid light to check for proper signal to the injector while cranking the engine.
  3. If there is no signal, check the wiring and connectors for damage.
  4. If the fuel injector is faulty, remove it and replace it with a new one.
  5. Reconnect the fuel injector and the electrical connector.