how to fix P0301 misfire code on Honda Accord 8th Generation (2008-2012)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the engine is cool and disconnect the negative battery terminal for safety.

2. Replace Spark Plug

• Tools Required: Spark plug socket, socket ratchet, torque wrench.
• Remove the ignition coil by unscrewing any retaining bolts and disconnecting the electrical connector.
• Remove the spark plug using the spark plug socket.
• Check the spark plug gap and replace it if it is out of specification (typically 0.043 inches for Honda).
• Install the new spark plug hand-tight, then torque it to the manufacturer’s specification (usually around 13 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil (if necessary)

• Tools Required: Socket set.
• Remove the ignition coil from cylinder 1 as described previously.
• Inspect the coil for cracks or burn marks; if damaged, replace it with a new one.
• Reinstall the new ignition coil and ensure it is securely fastened.

4. Test Fuel Injector

• Tools Required: Fuel injector tester.
• Disconnect the fuel injector connector for cylinder 1.
• Use the fuel injector tester to check if the injector is firing properly. Replace it if it is not functioning correctly.
• Reconnect the fuel injector once testing is complete.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0301 code from the system.