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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, compression tester, fuel injector cleaning kit.
• Disconnect the negative terminal of the battery to ensure safety while working on the vehicle.

2. Replace Spark Plug

1. Remove the engine cover if applicable.
2. Use a socket wrench to remove the spark plug from cylinder 2.
3. Inspect the spark plug for wear or damage; replace if necessary.
4. Apply anti-seize lubricant to the threads of the new spark plug.
5. Install the new spark plug and torque it to the manufacturer’s specifications (typically around 13-16 lb-ft).
6. Reconnect any components that were removed.

3. Test and Replace Ignition Coil

1. Disconnect the ignition coil connector for cylinder 2.
2. Use a multimeter to test the resistance of the ignition coil; compare with manufacturer specifications.
3. If the coil is faulty, replace it with a new one.
4. Reconnect the ignition coil connector and ensure it's secure.

4. Inspect and Clean Fuel Injector

1. Remove the fuel injector for cylinder 2 by detaching the fuel rail and connector.
2. Use a fuel injector cleaning kit to clean the injector or replace it if cleaning does not resolve the issue.
3. Reinstall the injector and reconnect the fuel rail and connector securely.

5. Perform Compression Test

1. Remove the spark plug for cylinder 2.
2. Insert a compression tester into the spark plug hole.
3. Crank the engine a few times and record the pressure reading.
4. Compare the reading with specifications; if low, further investigation is needed for internal engine issues.