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 shorts.
• Allow the engine to cool completely before starting work.

2. Inspect and Replace Spark Plug

• Remove the engine cover (if applicable) using a socket set.
• Disconnect the ignition coil connector from the cylinder 2 ignition coil.
• Remove the ignition coil using a socket wrench.
• Inspect the spark plug for wear or carbon buildup; replace if needed using a spark plug socket.
• Install a new spark plug, ensuring the gap is set to manufacturer specifications (typically around 0.044 inches for Honda).
• Reinstall the ignition coil and reconnect the connector.

3. Check and Replace Fuel Injector

• Remove any necessary components for access to the fuel injector (e.g., intake manifold if required).
• Disconnect the fuel injector connector and remove the retaining clips.
• Carefully pull the fuel injector out of the rail; inspect for clogs or damage.
• Replace the fuel injector with a new one, ensuring proper sealing.
• Reconnect the fuel injector connector and any other components removed during disassembly.

4. Compression Test

• Remove the spark plug from cylinder 2 and insert the compression gauge.
• Crank the engine for a few seconds and record the compression reading.
• Compare the reading to manufacturer specifications; if low, further investigation into the cylinder head or piston rings may be necessary.