how to fix P0302 misfire code on Honda Accord 10th Generation (2018-2022)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is cool and disconnect the negative battery terminal.

2. Remove Ignition Coil and Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if necessary.
• Disconnect the electrical connector from the ignition coil.
• Remove the ignition coil from cylinder 2 by unbolting it.
• Using a spark plug socket, carefully remove the spark plug from cylinder 2.

3. Inspect and Replace Components

• Tools Required: Inspection mirror, compressed air (optional).
• Inspect the ignition coil for cracks or carbon tracking; replace if damaged.
• Examine the spark plug for wear; replace if it shows signs of fouling or excessive wear.
• If necessary, clean the spark plug threads and the cylinder head area with compressed air.

4. Test and Replace Fuel Injector (if needed)

• Tools Required: Noid light or multimeter.
• Connect a noid light to the fuel injector connector to check for proper signal; replace the injector if there's no signal.
• If the injector is faulty, remove it from the intake manifold and replace it with a new one, ensuring proper alignment and connection.

5. Reassemble and Clear Codes

• Reinstall the spark plug and torque to manufacturer specifications (typically around 13-16 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.
• If removed, reattach the engine cover.
• Reconnect the negative battery terminal and use an OBD-II scanner to clear the P0302 code.