what does the P0301 code indicate in my Honda Pilot YF3 (2016-2022)

Solution

1. Preparation

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

2. Replace Spark Plug

• Sub-steps:
  1. Remove the ignition coil from cylinder 1 by unscrewing the bolts and disconnecting the electrical connector.
  2. Remove the spark plug using a spark plug socket and ratchet.
  3. Inspect the old spark plug for damage; replace it with a new spark plug that matches OEM specifications (e.g., NGK or Denso).
  4. Torque the new spark plug to manufacturer specifications (typically around 13 lb-ft).
  5. Reinstall the ignition coil and reconnect the electrical connector.

3. Check and Replace Ignition Coil (if necessary)

• Sub-steps:
  1. Remove the ignition coil from cylinder 1 as previously done.
  2. Test the ignition coil with an ohmmeter; compare readings with specifications in the service manual.
  3. If faulty, replace the ignition coil with a new one that matches OEM specifications.
  4. Reinstall the new ignition coil and reconnect the electrical connector.

4. Inspect and Replace Fuel Injector (if necessary)

• Sub-steps:
  1. Remove any components obstructing access to the fuel injector in cylinder 1.
  2. Disconnect the fuel injector electrical connector.
  3. Remove the fuel injector using a fuel injector removal tool.
  4. Inspect the injector for clogs or damage; replace if necessary with an OEM injector.
  5. Reinstall the new fuel injector and reconnect the electrical connector.

5. Perform Compression Test (if misfire persists)

• Sub-steps:
  1. Remove all spark plugs for easier cranking.
  2. Insert a compression gauge into the spark plug hole of cylinder 1.
  3. Crank the engine for a few seconds and record the reading.
  4. Compare the reading with the specifications in the service manual (should be around 180-200 psi).
  5. If compression is low, further diagnostics of the engine may be necessary.