how to fix P0302 engine code on Honda Accord Eleventh Generation (2023-present)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil for cylinder 2 by unscrewing the bolts and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket.
• Inspect the old spark plug for signs of wear. If necessary, install a new spark plug with the correct gap (typically 0.043 inches for Honda engines).
• Torque the new spark plug to the manufacturer’s specifications (usually around 13 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Replace Ignition Coil

• Tools Required: Socket set, torque wrench.
• If the ignition coil was found to be faulty, remove the old ignition coil from cylinder 2.
• Install the new ignition coil and torque it to specifications (often around 8 lb-ft).
• Reconnect the electrical connector to the ignition coil.

4. Clean or Replace Fuel Injector

• Tools Required: Fuel injector cleaner kit or replacement fuel injector.
• If the fuel injector was found to be faulty or clogged, remove the fuel rail by unscrewing the bolts and disconnecting the fuel lines (take care with fuel spillage).
• Remove the fuel injector from cylinder 2.
• If cleaning, use a fuel injector cleaner kit to clean the injector. If replacing, install the new injector with new O-rings.
• Reassemble the fuel rail and ensure all connections are secure.

5. Perform Compression Test (if needed)

• Tools Required: Compression tester.
• Remove the spark plug for cylinder 2.
• Insert the compression tester and crank the engine to take a reading.
• Compare the results to the manufacturer’s specifications for acceptable compression levels. If compression is low, further investigation may be needed (e.g., valve issues).