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 battery terminal to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench.
• Remove the ignition coil from cylinder 2 by unscrewing the mounting bolts.
• Carefully pull the ignition coil out of the spark plug well.
• Remove the old spark plug using a spark plug socket.
• Inspect the new spark plug for proper gap (0.043 inches for Honda Accord).
• Install the new spark plug and torque it to the manufacturer’s specification (usually around 13 lb-ft).
• Reinstall the ignition coil and secure it with the mounting bolts.

3. Inspect and Replace Ignition Coil (if necessary)

• If the ignition coil appears damaged or if the vehicle continues to misfire after spark plug replacement, replace the ignition coil.
• Remove the faulty ignition coil and install a new one by reversing the removal steps.
• Ensure all connectors are secure.

4. Test Fuel Injector (if necessary)

• If the misfire persists, inspect and test the fuel injector for cylinder 2.
• Remove the fuel injector connector and perform a resistance test using a multimeter; compare to specifications (typically around 12-16 ohms).
• If faulty, replace the fuel injector. Ensure to use proper O-rings and connectors during installation.