how to fix P0301 code in my Honda Pilot Third Generation (2016-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 1.
  • Tools: Socket set, ratchet.
• Remove the spark plug using a spark plug socket.
  • Inspect the spark plug for wear or deposits; replace if necessary.
  • Torque the new spark plug to the manufacturer's specifications (typically 13-15 lb-ft).
• Reinstall the ignition coil securely.

3. Inspect and Replace Ignition Coil (if necessary)

• If the ignition coil shows signs of damage, replace it.
  • Disconnect the electrical connector from the ignition coil.
  • Remove the mounting bolts of the coil and take it out.
  • Install the new ignition coil and reconnect the electrical connector.
  • Torque the mounting bolts to specification.

4. Test Fuel Injector

• Remove the fuel injector from cylinder 1.
  • Tools: Fuel injector puller, socket set.
• Check the injector for clogs or damage; clean or replace as necessary.
• Reinstall the fuel injector, ensuring a proper seal.

5. Perform Compression Test

• Reinstall the spark plug and ignition coil temporarily.
• Use a compression gauge to check the compression in cylinder 1.
• If compression is low, further investigation into piston rings or valves may be required.