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

Solution

1. Preparation

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

2. Replace Spark Plug

• Remove the engine cover (if applicable) using a socket set.
• Disconnect the ignition coil connector and remove the ignition coil from cylinder 1.
• Using a spark plug socket, remove the spark plug from cylinder 1.
• Inspect the old spark plug for signs of wear or fouling.
• Install the new spark plug, torquing to the manufacturer's specification (usually around 13 lb-ft).
• Reinstall the ignition coil and reconnect the connector.

3. Test or Replace Ignition Coil

• Check the ignition coil resistance using a multimeter. The primary resistance should be around 0.5 to 1.5 ohms, and secondary resistance should be around 6,000 to 15,000 ohms.
• If out of range, replace the ignition coil with a new one.
• Reconnect ignition coil connector after installation.

4. Inspect and Clean Fuel Injector

• Disconnect the fuel injector connector and remove the fuel rail (if necessary).
• Test fuel injector operation using a noid light to confirm proper electrical signal.
• If faulty, replace the fuel injector for cylinder 1.
• Reinstall the fuel rail and reconnect all connectors.

5. Compression Testing

• Remove the spark plugs from all cylinders.
• Insert a compression gauge into cylinder 1 and crank the engine.
• Check the reading; it should be within the manufacturer's specifications (usually around 180-210 psi).
• If compression is low, further investigation of the cylinder head, valves, or piston rings may be needed.