why does my Honda Civic 11th Generation (2022-Present) check engine light flash?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface.
• Disconnect the battery to prevent electrical shorts.

2. Retrieve and Analyze Codes

• Use the OBD-II scanner to pull diagnostic trouble codes (DTCs).
• Note down codes related to misfires (P0300 series) or fuel system issues.

3. Inspect and Replace Spark Plugs

• Remove ignition coil covers if necessary.
• Unscrew and remove spark plugs using a socket wrench.
• Inspect for wear or fouling; replace with OEM specifications if needed (typically NGK or Denso types).
• Torque new spark plugs to manufacturer's specification (usually around 13-15 lb-ft).

4. Check and Replace Ignition Coils

• Disconnect electrical connectors from the ignition coils.
• Remove the coils using the appropriate socket.
• Inspect for cracks or damage; replace any faulty coils.
• Reinstall the new coils and reconnect the electrical connectors.

5. Test Fuel System

• Connect a fuel pressure gauge to the fuel rail.
• Turn the ignition to the ON position (do not start) and check for proper fuel pressure (typically 40-50 psi).
• If pressure is low, inspect the fuel pump and filter; replace as necessary.

6. Inspect Air Intake and Vacuum System

• Check the air filter for cleanliness; replace if clogged.
• Visually inspect the intake manifold for leaks or cracks.
• Perform a smoke test to identify vacuum leaks; repair any found.