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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal for safety.

2. Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench
• Remove the engine cover if necessary.
• Use the spark plug socket to remove the spark plug from cylinder 1.
• Inspect the spark plug for wear; if damaged, replace it with a new one.
• Torque the new spark plug to the manufacturer’s specification (typically around 13-16 lb-ft).
• Reinstall the engine cover if removed.

3. Test and Replace Ignition Coil

• Tools Required: Socket set, multimeter
• Disconnect the ignition coil connector from cylinder 1.
• Remove the ignition coil using the socket set.
• Test the ignition coil with a multimeter to ensure it is functioning properly (check primary and secondary resistance).
• If faulty, replace with a new ignition coil.
• Reinstall the ignition coil and reconnect the connector.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner, safety glasses
• Disconnect the fuel injector connector and remove the injector from cylinder 1.
• Inspect the fuel injector for clogs or leaks.
• Clean the injector using fuel injector cleaner or replace it if necessary.
• Reinstall the injector and reconnect the connector.

5. Vacuum Leak Inspection

• Visually inspect all vacuum hoses and connections around the intake manifold.
• Use a smoke machine or carburetor cleaner to check for leaks while the engine is running.
• Repair any leaks found.

6. Compression Test

• Tools Required: Compression tester
• Remove the spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole.
• Crank the engine for several seconds to get a reading.
• Compare the reading to the manufacturer’s specifications (typically around 180-200 psi).
• If the compression is low, further investigation into internal engine issues may be required.