my Honda Civic 11th Generation (2022-Present) has a check engine light with P0302 code, what does it...

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, gap gauge.
• Remove the ignition coil from cylinder 2 by unfastening the retaining bolts and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket. Inspect for wear or damage.
• If necessary, replace the spark plug with a new one, ensuring it is gapped correctly according to specifications (typically around 0.044 inches for Honda).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Check and Replace Ignition Coil

• If the spark plug inspection shows no issues, proceed to the ignition coil.
• Tools Required: Socket set, torque wrench.
• Remove the ignition coil from cylinder 2.
• Test the ignition coil using a multimeter to check for proper resistance. Replace if faulty.
• Install the new ignition coil and reconnect the electrical connector.

4. Inspect and Test Fuel Injector

• If the ignition components are fine, inspect the fuel injector.
• Tools Required: Fuel pressure gauge, multimeter.
• Disconnect the fuel injector connector and test for voltage using a multimeter.
• If there is no voltage or irregular readings, replace the fuel injector.
• Reconnect the fuel injector and check for leaks.

5. Perform Compression Test

• If misfire persists, perform a compression test on cylinder 2.
• Tools Required: Compression gauge.
• Remove spark plug from cylinder 2 and connect the compression gauge.
• Crank the engine and note the compression reading. Compare it to manufacturer specifications.
• If compression is low, further inspection of valves or piston rings may be necessary.