how to fix P0302 misfire code on Honda Accord 8th Generation (2008-2012)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the engine is cool before proceeding with repairs.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, ratchet, spark plug socket
• Remove the ignition coil for cylinder 2 by unscrewing the bolts and disconnecting the electrical connector.
• Remove the spark plug with a spark plug socket.
• Inspect the old spark plug for wear or fouling. Replace it with a new spark plug, ensuring the gap is set to manufacturer's specifications (typically around 0.043 inches).
• Torque the new spark plug to the manufacturer's specification (usually around 13 lb-ft).

3. Inspect and Replace Ignition Coil (if necessary)

• If the spark plug replacement does not resolve the issue, replace the ignition coil on cylinder 2.
• Disconnect the ignition coil connector and unscrew the mounting bolts.
• Install the new ignition coil and reconnect the electrical connector.

4. Check and Clean Fuel Injector

• If the ignition components are functioning correctly, check the fuel injector for cylinder 2.
• Remove the injector connector and unscrew the injector from the rail.
• Inspect the injector for clogs or damage. Clean or replace the injector as necessary.
• Reinstall the injector and connector.

5. Reassemble and Reconnect

• Reinstall any components removed during the process, including the ignition coils.
• Reconnect the negative battery terminal.