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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal for safety.
• Ensure the engine is cool before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the ignition coil cover if applicable.
• Disconnect the electrical connector from the ignition coil.
• Remove the ignition coil from cylinder 2.
• Unscrew the spark plug using a spark plug socket.
• Inspect the spark plug for wear, deposits, or damage.
• If necessary, replace the spark plug with a new one (recommended gap and type per manufacturer specifications).
• Torque the new spark plug to the manufacturer's specifications (usually around 13-16 ft-lbs).
• Reinstall the ignition coil.

3. Test and Replace Ignition Coil (if needed)

• Tools Required: Multimeter
• Measure the resistance of the ignition coil using a multimeter. Compare with specifications.
• If the coil is out of range, replace it with a new one.
• Ensure proper connection of the ignition coil and reconnect the electrical connector.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner or replacement injector
• Disconnect the fuel injector electrical connector and remove the injector from cylinder 2.
• Inspect the injector for clogs or damage.
• Clean the fuel injector with an appropriate cleaner or replace if necessary.
• Reinstall the injector ensuring it seats correctly.

5. Perform Compression Test

• Tools Required: Compression gauge
• Remove the spark plug from cylinder 2.
• Insert the compression gauge into the spark plug hole.
• Crank the engine several times to obtain a reading.
• Compare the reading to manufacturer specifications. A low reading may indicate internal engine issues.