what causes P0302 code on Honda Civic 9th Generation (2012-2015)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Replace Ignition Coil

• Tools Required: Socket set, torque wrench, multimeter
• Remove the engine cover if applicable.
• Disconnect the electrical connector from the ignition coil for cylinder 2.
• Unbolt the ignition coil using a socket wrench.
• Remove the ignition coil and inspect for damage.
• If damaged, install a new ignition coil and torque the bolts to manufacturer specifications (typically around 8-10 lb-ft).
• Reconnect the electrical connector.

3. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, torque wrench
• Remove the ignition coil again to access the spark plug.
• Use a spark plug socket to unscrew and remove the spark plug from cylinder 2.
• Inspect the spark plug for wear or damage, and check the gap with a feeler gauge.
• Install a new spark plug with the correct gap (usually around 0.044 inches for Honda).
• Torque the spark plug to manufacturer specifications (typically around 13-16 lb-ft).
• Reinstall the ignition coil.

4. Check Fuel Injector

• Tools Required: Fuel injector cleaner, multimeter
• Disconnect the fuel injector connector for cylinder 2.
• Use a multimeter to check the resistance of the injector. Compare with the manufacturer’s specifications (usually around 12-16 ohms).
• If the injector is faulty, replace it by removing the retaining clips and installing a new injector.
• Reconnect the fuel injector connector.

5. Compression Test (if necessary)

• Tools Required: Compression tester
• Remove spark plugs from all cylinders.
• Insert the compression tester into the spark plug hole of cylinder 2.
• Crank the engine and record the compression reading.
• Compare with manufacturer specifications (typically around 180 psi).
• If compression is low, further inspection for valve or piston issues is required.