how to repair a Honda Civic 9th Generation (2012-2015) with a P0302 code

Solution

1. Preparation

• Gather tools and parts. Disconnect the negative battery terminal to prevent electrical shorts.
• Tools Required:
  • OBD-II scanner
  • Socket set
  • Torque wrench
  • Compression tester
  • Multimeter
  • Screwdrivers

2. Inspect and Replace Spark Plug

• Remove the ignition coil and spark plug from cylinder 2.
  • Use a socket wrench to remove the spark plug.
• Inspect the spark plug for wear or damage.
  • If the spark plug is fouled or worn, replace it with a new one.
• Reinstall the spark plug and torque it to the manufacturer’s specification (usually around 13 lb-ft).

3. Check and Replace Ignition Coil

• Test the ignition coil using a multimeter to check for proper resistance.
  • If the readings are outside the specified range, replace the ignition coil.
• Install the new ignition coil, ensuring it is seated properly on the spark plug.

4. Inspect and Clean/Replace Fuel Injector

• Remove the fuel injector from cylinder 2.
  • Disconnect the electrical connector and fuel line carefully.
• Inspect the injector for clogs or damage. If necessary, clean using an injector cleaning solution or replace with a new injector.
• Reinstall the fuel injector and connect the electrical connector and fuel line.

5. Perform Compression Test

• Attach the compression tester to the spark plug hole of cylinder 2.
• Crank the engine a few times and record the compression reading.
  • If the compression is below specifications, further engine diagnostics may be required.

6. Final Assembly

• Reconnect all components, including the ignition coil, spark plug, and any disconnected connectors.
• Reconnect the negative battery terminal.