how to resolve P0302 code on Honda Civic 11th Generation (2022-Present)

Solution

1. Preparation

• Gather necessary tools and safety equipment.
• Park the vehicle on a flat surface and engage the parking brake.
• Disconnect the battery negative terminal to prevent electrical shorts.

2. Inspect Ignition Components

• Tools Required: Socket set, torque wrench
• Remove the engine cover (if applicable) using a socket set.
• Carefully disconnect the ignition coil connector for cylinder 2.
• Remove the ignition coil from cylinder 2 by unscrewing it.
• Inspect the spark plug for wear and carbon buildup; replace if necessary.
• Install a new spark plug (if applicable) and torque to manufacturer specifications (typically around 13 lb-ft).
• Reinstall the ignition coil and reconnect the connector.

3. Check Fuel Injector

• Tools Required: Noid light or multimeter
• Disconnect the fuel injector connector for cylinder 2.
• Connect a noid light or multimeter to the injector connector to check for proper signal.
• If no signal is detected, inspect wiring and connectors for damage.
• If the signal is present, use a fuel injector cleaning kit to clean or replace the injector if it is clogged.

4. Perform Compression Test

• Tools Required: Compression tester
• Remove the spark plug from cylinder 2.
• Install the compression tester in the spark plug hole.
• Crank the engine for several seconds and record the compression reading.
• Compare the reading to manufacturer specifications (usually 180-210 psi).
• If compression is low, further investigation into internal engine components may be necessary (valve seals, piston rings).

5. Reassemble and Reconnect

• Reinstall any components removed during the inspection and repair process.
• Reconnect the battery negative terminal.
• Clear the error codes using the OBD-II scanner.