how to fix the P0302 code on my Honda Civic 10th Generation (2016-2021)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface, and the engine is cool.
• Disconnect the negative battery terminal to avoid electrical shorts.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil from cylinder 2 by unscrewing the retaining bolts and disconnecting the electrical connector.
• Remove the spark plug using the spark plug socket. Inspect for wear or carbon buildup.
• Replace with a new spark plug, ensuring it is gapped correctly according to the manufacturer’s specifications (typically 0.044 inches for Honda Civic).
• Torque the spark plug to 13 lb-ft (17.6 Nm) to avoid damage.

3. Inspect and Replace Ignition Coil

• If the spark plug is in good condition, inspect the ignition coil for cylinder 2.
• Tools Required: Socket set.
• If faulty, remove the ignition coil from cylinder 2 and replace it with a new one.
• Reconnect the electrical connector and ensure it is securely fastened.

4. Check Fuel Injector

• Tools Required: Multimeter or noid light.
• Disconnect the fuel injector connector for cylinder 2.
• Test the injector for proper operation using a multimeter or noid light. If it fails to operate, replace the fuel injector.
• Reconnect the injector connector.

5. Compression Test

• Tools Required: Compression tester.
• Remove the spark plug for cylinder 2 and install the compression tester.
• Crank the engine and note the compression reading. A healthy cylinder should have readings within the manufacturer’s specifications (typically 180 psi or higher).
• If the reading is low, further diagnosis is needed for possible internal engine issues.