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

Solution

1. Preparation

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

2. Replace Spark Plug and Ignition Coil

• Tools Required: Socket set, torque wrench, spark plug gap gauge.
• Remove the engine cover if applicable.
• Unplug the ignition coil connector for cylinder 2.
• Remove the ignition coil mounting bolts and carefully pull out the ignition coil.
• Remove the spark plug using a socket and ratchet.
• Inspect the old spark plug for wear; if damaged, replace it.
• Install a new spark plug, ensuring it is gapped to manufacturer specifications.
• Reinstall the ignition coil, securing it with bolts and reconnecting the electrical connector.

3. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner, basic hand tools.
• Disconnect the fuel injector connector for cylinder 2.
• Carefully remove the fuel injector using the appropriate tools.
• Clean the injector using a specialized fuel injector cleaner or replace it if necessary.
• Reinstall the injector and reconnect the electrical connector.

4. Perform a Compression Test

• Tools Required: Compression tester.
• Remove all spark plugs for even pressure distribution.
• Insert the compression tester into cylinder 2.
• Crank the engine and record the compression reading.
• Compare the reading to the specifications in the service manual; if low, further diagnostics may be necessary.

5. Reassemble and Reconnect

• Reinstall any components removed during the repair process.
• Reconnect the negative battery terminal.
• Replace the engine cover if applicable.