how to fix the P0302 code on my Honda Civic 9th Generation (2012-2015)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shock.
• Allow the engine to cool completely before beginning work.

2. Replace Spark Plug (if faulty)

• Tools Needed: Socket set, spark plug socket, torque wrench.
• Remove the ignition coil from cylinder 2 by unscrewing the retaining bolts and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket and ratchet.
• Inspect the old spark plug for damage; replace with a new spark plug if necessary, ensuring the gap is set according to manufacturer specifications (typically 0.044 inches for Honda).
• Install the new spark plug and torque it to the manufacturer’s specification (usually around 13 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Replace Ignition Coil (if faulty)

• If the ignition coil was found to be defective during diagnostics, remove it following the previous steps.
• Install the new ignition coil and ensure it is properly connected.

4. Clean or Replace Fuel Injector (if clogged)

• If the fuel injector is clogged, remove it by detaching the fuel rail.
• Clean the injector with a dedicated cleaner or replace it with a new one.
• Reinstall the fuel rail and ensure all connections are secure.

5. Perform Compression Test (if low compression is found)

• If low compression is detected, further investigate by inspecting the cylinder head and piston rings.
• Repair any mechanical issues as necessary (this may require more extensive engine work).