what does the P0302 code mean for my Honda Accord 8th Generation (2008-2012)

Solution

1. Preparation

• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, dielectric grease.
• Remove the ignition coil from cylinder 2 by unscrewing it.
• Take out the spark plug using a spark plug socket.
• Inspect the spark plug for wear; replace it if necessary.
• Apply a small amount of dielectric grease to the threads of the new spark plug.
• Install the new spark plug and torque it to the manufacturer’s specifications (usually around 13-15 lb-ft).
• Reinstall the ignition coil.

3. Check and Replace Ignition Coil (if necessary)

• If the spark plug is in good condition, test the ignition coil using a multimeter.
  • Measure the primary and secondary resistance; compare with manufacturer specifications.
• If the ignition coil is faulty, replace it with a new one.
• Reconnect the ignition coil to the spark plug.

4. Inspect Fuel Injector

• Tools Required: Fuel injector puller (if necessary), multimeter.
• Disconnect the fuel injector connector for cylinder 2.
• Use a multimeter to check for proper voltage and resistance.
• If the injector is faulty, replace it with a new fuel injector.
• Reconnect the fuel injector and ensure it is seated properly.

5. Compression Test (if misfire persists)

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 2.
• Insert the compression tester and crank the engine to get a reading.
• Compare the compression reading with manufacturer specifications.
• If the reading is low, further engine diagnostics may be needed.