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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative terminal of the battery to ensure safety.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if applicable.
• Disconnect the ignition coil connector for cylinder 2.
• Remove the ignition coil using a socket.
• Remove the old spark plug using a spark plug socket.
• Install a new spark plug and torque it to manufacturer specifications (typically 13 lb-ft).
• Reinstall the ignition coil and reconnect the connector.

3. Inspect and Replace Ignition Coil (if necessary)

• If the ignition coil was found faulty during diagnosis:
  • Remove the ignition coil from cylinder 2.
  • Install a new ignition coil and reconnect the wiring harness.
  • Ensure proper seating and connection.

4. Test Fuel Injector (if necessary)

• If the fuel injector was found faulty:
  • Disconnect the fuel injector connector.
  • Remove the fuel rail (ensure fuel pressure is released beforehand).
  • Replace the faulty fuel injector with a new one.
  • Reassemble the fuel rail and reconnect the injector connector.

5. Perform Compression Test (if necessary)

• If compression was low:
  • Use a compression gauge to check cylinder pressure.
  • If low, further disassembly may be required to inspect piston rings and valves.