what does a P0302 code mean for my Honda Civic 9th Generation (2012-2015)?

Solution

1. Preparation

• Gather all tools and parts needed for the repair.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder number 2.
• Remove the spark plug using a spark plug socket and ratchet.
• Inspect the spark plug for signs of damage or excessive wear.
• Replace with a new spark plug if necessary (ensure proper gap as per manufacturer specifications).

3. Inspect and Replace Ignition Coil

• If the spark plug is in good condition, test the ignition coil by measuring resistance with a multimeter.
• If out of specifications, replace the ignition coil for cylinder number 2.
• Reinstall the coil and ensure it is secured properly.

4. Check and Replace Fuel Injector

• Disconnect the fuel injector connector for cylinder number 2.
• Perform a resistance test on the fuel injector to ensure it is functioning.
• Replace the fuel injector if it fails the test.
• Reconnect the fuel injector and ensure proper seating.

5. Conduct Compression Test

• If misfire persists, perform a compression test on cylinder number 2.
• Compare the reading to the specifications provided in the service manual.
• If compression is low, further diagnosis may be needed for internal engine issues.