how to resolve P0301 misfire code in Honda Accord 9th Generation (2013-2017)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to ensure safety.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the ignition coil from cylinder 1 by unbolting it and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear, carbon buildup, or damage.
• Replace with a new spark plug, ensuring it is gapped to the manufacturer's specifications (typically 0.043 inches).
• Torque the spark plug to manufacturer’s specification (around 13 lb-ft).
• Reinstall the ignition coil.

3. Check and Replace Ignition Coil (if necessary)

• If the spark plug is fine, test the ignition coil for proper function using a multimeter.
• If faulty, replace the ignition coil with a new one.
• Reconnect the electrical connector and secure it in place.

4. Inspect Fuel Injector

• If the ignition components are operational, check the fuel injector for cylinder 1.
• Disconnect the fuel injector connector and perform a resistance test with a multimeter.
• If the fuel injector is faulty, replace it with a new one.
• Reconnect the fuel injector connector.

5. Test Drive

• Reconnect the negative battery terminal.
• Start the engine and allow it to warm up.
• Take the vehicle for a test drive to ensure the misfire code does not return.