how to fix Honda Pilot YF4 (2023-Present) engine light with P0301 code

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover (if applicable) by unscrewing any bolts or clips.
  2. Disconnect the ignition coil connector from cylinder 1.
  3. Remove the ignition coil using a socket set.
  4. Unscrew the spark plug with a spark plug socket.
  5. Inspect the spark plug for wear; replace it if necessary.
  6. Install the new spark plug and torque it to the manufacturer’s specification (usually around 13-15 lb-ft).
  7. Reinstall the ignition coil and reconnect the electrical connector.

3. Test and Replace Ignition Coil (if necessary)

• Sub-steps:
  1. Use a multimeter to test the ignition coil's primary and secondary resistance according to the specifications in the service manual.
  2. If the coil is faulty, remove it as described in the previous step.
  3. Install the new ignition coil and ensure it is securely connected.

4. Check Fuel Injector

• Sub-steps:
  1. Remove the intake manifold (if necessary) to access the fuel injector for cylinder 1.
  2. Disconnect the fuel injector connector.
  3. Test the injector with a noid light to ensure it receives a signal. Replace if no signal is present.
  4. If the injector is clogged, clean it or replace it as needed.

5. Verify Compression

• Sub-steps:
  1. Remove the spark plug from cylinder 1.
  2. Insert a compression tester into the spark plug hole.
  3. Crank the engine for a few seconds and record the reading.
  4. Compare the reading with manufacturer specifications. Replace or repair engine components as needed if low compression is detected.