how to fix P0301 code in my Honda Pilot YF4 (2023-Present)

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil from cylinder 1 by unscrewing the bolts and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket and socket wrench.
• Inspect the spark plug for signs of wear or fouling. Replace with a new spark plug if necessary.
• Torque the new spark plug to the manufacturer’s specifications (typically around 13 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil

• If the spark plug is in good condition but the misfire persists, test the ignition coil for cylinder 1.
• Tools Required: Multimeter.
• Set the multimeter to measure resistance and check the primary and secondary resistance of the coil.
• If the readings are out of specification, replace the ignition coil with a new one.
• Reinstall the ignition coil and ensure secure connections.

4. Check Fuel Injector

• Tools Required: Fuel injector cleaner or replacement injector.
• Remove the fuel injector from cylinder 1, taking care to disconnect the electrical connector and any retaining clips.
• Clean the injector using a fuel injector cleaning kit or replace with a new injector if cleaning does not resolve issues.
• Reinstall the injector and reconnect the electrical connector.

5. Perform Compression Test

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 1 and insert the compression tester into the spark plug hole.
• Crank the engine a few times to get a reading. Compare the reading to the manufacturer’s specifications.
• If compression is low, further diagnosis may be required for internal engine issues.