how to fix P0302 code in Honda Civic 11th Generation (2022-Present)

Solution

1. Preparation

• Gather tools and parts required.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal for safety.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, anti-seize compound.
• Remove the engine cover if applicable.
• Use the spark plug socket to unscrew the old spark plug from cylinder 2.
• Inspect the spark plug for wear; replace it with a new spark plug that meets OEM specifications.
• Apply a small amount of anti-seize compound to the threads of the new spark plug.
• Torque the new spark plug to the manufacturer’s specifications (typically around 13 lb-ft for Honda).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, multimeter.
• Disconnect the ignition coil connector and remove the coil from cylinder 2.
• Test the ignition coil with a multimeter; check for resistance values according to the service manual (usually around 0.5 to 1.5 ohms).
• If faulty, replace the ignition coil with a new one that meets OEM specifications.
• Reinstall the ignition coil and reconnect the harness.

4. Clean or Replace Fuel Injector

• Tools Required: Fuel injector cleaner, fuel line removal tool.
• If issues persist, remove the fuel injector from cylinder 2.
• Inspect for clogs or signs of wear. Use a fuel injector cleaner to clean if reusable, or replace with a new fuel injector as needed.
• Reinstall the injector and ensure all connections are snug.

5. Perform Compression Test

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 2 and connect the compression tester.
• Crank the engine and note the compression reading; it should meet manufacturer specifications (generally 180-200 psi for Honda engines).
• If compression is low, further investigation into engine internals may be necessary.