how to fix the P0301 code in my Honda Civic 11th Generation (2022-Present)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Compression tester
• Multimeter
• Noid light

2. Inspect and Replace Spark Plug

1. Remove the engine cover if applicable.
2. Using a socket, remove the spark plug from cylinder 1.
3. Inspect the spark plug for wear, carbon buildup, or damage. If worn, replace it with a new spark plug recommended for your Civic.
4. Torque the new spark plug to the manufacturer's specifications (typically around 13 ft-lbs).
5. Reinstall the engine cover if applicable.

3. Check and Replace Ignition Coil

1. Disconnect the ignition coil connector for cylinder 1.
2. Remove the ignition coil using a socket.
3. Inspect the coil for cracks or damage. If defective, replace it with a new ignition coil.
4. Reinstall the ignition coil and connect the electrical connector securely.

4. Test Fuel Injector

1. Disconnect the fuel injector connector for cylinder 1.
2. Connect a noid light to the fuel injector connector to check for electrical signal.
3. If no signal is present, check wiring and connectors. If the injector is faulty, replace it.
4. Once the injector has been tested or replaced, reconnect the fuel injector connector.

5. Perform Compression Test

1. Remove the spark plug from cylinder 1 again.
2. Insert the compression tester into the spark plug hole.
3. Crank the engine several times and record the compression reading.
4. Compare the compression reading to the manufacturer's specifications. If low, further investigation is needed for possible internal engine issues.