my Honda Civic keeps getting a P0302 code, how to fix this issue?

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil and inspect it.
• Unscrew and remove the old spark plug from cylinder 2.
• Install a new spark plug, ensuring it’s gapped correctly (typically 0.044 inches for Honda Civic).
• Torque the spark plug to the manufacturer’s specification (usually around 13 lb-ft).

3. Inspect and Replace Ignition Coil (if necessary)

• Tools Required: Socket set, multimeter.
• If the ignition coil is faulty, remove it from cylinder 2.
• Test the coil with a multimeter (check primary and secondary resistance).
• Replace the ignition coil with a new one if it’s out of specification.

4. Check Fuel Injector

• Tools Required: Fuel injector cleaner, basic hand tools.
• Remove the fuel injector from cylinder 2.
• Inspect for clogs or damage; clean with a fuel injector cleaner or replace if necessary.
• Reinstall the injector ensuring proper seating and connections.

5. Perform Compression Test

• Tools Required: Compression tester.
• Insert the compression tester into cylinder 2.
• Crank the engine and note the compression reading.
• If readings are below specifications (usually between 180-200 psi for a Civic), further investigation into the engine's condition is required.

6. Reassemble and Reconnect Battery

• Reinstall any components that were removed during the process (ignition coils, covers, etc.).
• Reconnect the negative battery terminal.