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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, fuel injector cleaning kit.
• Disconnect the negative battery terminal to ensure safety while working on the electrical components.

2. Replace Spark Plug and Ignition Coil

• Remove the engine cover if applicable.
• Disconnect the electrical connector from the ignition coil on cylinder 2.
• Remove the bolt securing the ignition coil and carefully pull the coil out.
• Remove the spark plug using a spark plug socket and inspect it for wear or damage.
• Install a new spark plug and torque it to the manufacturer’s specifications (typically around 13 lb-ft).
• Replace the ignition coil with a new one and reconnect the electrical connector.

3. Test and Replace Fuel Injector

• Disconnect the fuel injector connector for cylinder 2.
• Use a multimeter to check the resistance of the injector (should be within manufacturer's specs, usually around 12-16 ohms).
• If the injector is faulty, remove it using the appropriate fuel injector puller or socket.
• Install a new fuel injector and ensure it is seated correctly and connected.

4. Perform Compression Test

• Remove all spark plugs to ensure even testing.
• Insert the compression tester into cylinder 2’s spark plug hole.
• Crank the engine for a few seconds and record the compression reading.
• If the reading is low (below specified range), further investigation may be needed for internal engine issues.

5. Reassemble and Test

• Reinstall all removed components in reverse order (engine cover, connectors).
• Reconnect the negative battery terminal.
• Clear the P0302 code using the OBD-II scanner and take the vehicle for a test drive to verify the repair.