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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure 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 tool.
• Remove the ignition coil by unscrewing the bolts and disconnecting the electrical connector.
• Extract the spark plug using a spark plug socket.
• Inspect the spark plug for wear; replace if necessary.
• Set the gap on the new spark plug according to specifications (typically 0.044 inches for Honda).
• Install the new spark plug and torque to manufacturer specifications (typically around 13 lb-ft).

3. Check and Replace Ignition Coil

• Reconnect the ignition coil and test for spark.
• If no spark is present, replace the ignition coil.
• Tools Required: Socket set, torque wrench.
• Remove the faulty ignition coil and install a new one, ensuring proper alignment and torque to specifications (usually around 7.2 lb-ft).

4. Inspect and Clean Fuel Injector

• Remove the fuel injector for cylinder 2.
• Tools Required: Fuel line disconnect tool, screwdriver.
• Inspect for clogs or damage; clean with appropriate injector cleaner or replace if necessary.
• Reinstall the injector and ensure all connections are secure.

5. Verify Compression

• If issues persist, perform a compression test on cylinder 2.
• Tools Required: Compression tester.
• If compression is below specifications (typically around 180 psi), further engine diagnostics may be needed to check for valve issues or head gasket leaks.