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

Solution

1. Preparation

• Gather tools and parts required for troubleshooting and repair.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket, ignition coil puller.
• Remove the engine cover if applicable.
• Unplug the ignition coil connector for cylinder 2.
• Remove the ignition coil by unscrewing the securing bolts and gently pulling it out.
• Inspect the ignition coil for cracks or damage; replace if necessary.
• Remove the spark plug for cylinder 2 using the spark plug socket.
• Inspect the spark plug for wear, carbon buildup, or damage; replace if necessary.
• Install the new spark plug and torque it to the manufacturer's specification (typically around 13 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Check and Replace Fuel Injector (if needed)

• Tools Required: Fuel injector puller, socket set.
• Disconnect the fuel injector connector for cylinder 2.
• Remove the fuel rail if necessary to access the fuel injector.
• Carefully pull out the fuel injector from the rail, inspecting the O-rings for damage.
• Install a new or refurbished fuel injector and ensure proper seating.
• Reassemble the fuel rail and reconnect the fuel injector connector.

4. Compression Test (if misfire persists)

• Tools Required: Compression tester.
• Remove all spark plugs for accurate testing.
• Install the compression tester in cylinder 2.
• Crank the engine and record the compression reading. Compare it to specifications (typically around 180 psi).
• If compression is low, further inspection for valve or piston damage is required.