how to fix P0302 misfire code in Honda Civic 9th Generation (2012-2015)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is cool and the battery is disconnected.

2. Replace Spark Plug

• Tools Required: Socket set (with spark plug socket), torque wrench.
• Remove the ignition coil from cylinder 2.
• Unscrew the spark plug using the spark plug socket.
• Inspect the spark plug for signs of wear, such as fouling or excessive gap.
• Install a new spark plug and torque it to the manufacturer’s specification (typically around 13-16 lb-ft).
• Reattach the ignition coil.

3. Replace Ignition Coil (if necessary)

• Tools Required: Socket set, torque wrench.
• If the ignition coil is faulty, remove it from cylinder 2.
• Install a new ignition coil, ensuring it is seated correctly.
• Torque the mounting bolts to the manufacturer's specifications (typically around 7.2 lb-ft).

4. Test Fuel Injector

• Tools Required: Multimeter or noid light.
• Disconnect the fuel injector connector on cylinder 2.
• Use a multimeter to test for voltage and continuity, or connect a noid light to check for injector pulse.
• If the injector is faulty, replace it with a new one.

5. Perform Compression Test

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 2.
• Insert the compression tester into the spark plug hole.
• Crank the engine and record the compression reading.
• Compare the reading to manufacturer specifications; if low, further diagnostics are needed.