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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative terminal of the battery to ensure safety while working with electrical components.

2. Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench.
• Remove the ignition coil from cylinder 2 by unbolting it and disconnecting the electrical connector.
• Remove the spark plug using the spark plug socket and ratchet.
• Inspect the spark plug gap and condition; if worn or fouled, replace with a new spark plug.
• Install the new spark plug and torque to the manufacturer's specified value (typically around 13 lb-ft).
• Reattach the ignition coil.

3. Test and Replace Ignition Coil (if necessary)

• If the spark plug is fine but misfire persists, test the ignition coil using a multimeter.
• If the ignition coil is faulty (improper resistance), remove the coil and replace it with a new one.
• Reinstall the ignition coil, ensuring the connector is secure.

4. Inspect and Replace Fuel Injector (if necessary)

• If the ignition coil is functional, check the fuel injector for cylinder 2.
• Remove the fuel injector connector and use a noid light to confirm that the injector is receiving a signal.
• If there’s no signal or injector is clogged, remove the injector and clean or replace it as necessary.
• Reinstall the fuel injector, ensuring it is seated properly and reconnect the electrical connector.

5. Reassemble and Reconnect

• Reconnect the battery terminal.
• Start the engine and check for any misfire codes and smooth operation.