my Honda Accord 10th Generation (2018-2022) shows P0302 code, what does it mean?

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, torque wrench, compression tester, fuel injector cleaner.
• Ensure the vehicle is parked on a level surface with the engine turned off and cool.

2. Replace Spark Plug

1. Disconnect the negative battery terminal to prevent electrical shorts.
2. Remove the engine cover if applicable.
3. Locate cylinder 2 spark plug (usually found near the front of the engine, check the owner’s manual for exact location).
4. Use a spark plug socket and ratchet to remove the old spark plug.
5. Inspect the spark plug for wear, carbon buildup, or oil fouling.
6. Install a new spark plug (gapping it to manufacturer specifications if necessary) and torque it to the specified value (typically around 13-17 lb-ft).
7. Reconnect the ignition coil and any related connectors.

3. Replace Ignition Coil

1. If the spark plug replacement did not resolve the issue, proceed to check the ignition coil.
2. Disconnect the wiring harness from the ignition coil.
3. Remove the ignition coil by unscrewing it using a socket set.
4. Install a new ignition coil and secure it with screws, ensuring it is seated properly.
5. Reconnect the wiring harness.

4. Check Fuel Injector

1. If misfire persists, perform a fuel injector inspection.
2. Disconnect the fuel injector connector for cylinder 2.
3. Use a multimeter to check for proper resistance values (refer to service manual for specifications).
4. If the injector is faulty, replace it with a new one, ensuring proper alignment and connection.
5. Reconnect the fuel injector wiring harness.

5. Verify Repair

• Reconnect the negative battery terminal.
• Start the engine and allow it to reach operating temperature.
• Clear any stored trouble codes using an OBD-II scanner.
• Take the vehicle for a test drive to ensure the check engine light does not reappear.