how to fix P0301 code in Honda Civic 10th Generation (2016-2021)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before beginning work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the engine cover if applicable.
• Remove the ignition coil by unbolting it and disconnecting the electrical connector.
• Remove the old spark plug using a spark plug socket and ratchet.
• Inspect the new spark plug gap and adjust if necessary.
• Apply a small amount of dielectric grease to the threads of the new spark plug.
• Install the new spark plug and torque it to 13 lb-ft (17.6 Nm).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Replace Ignition Coil (if necessary)

• Tools Required: Socket set, torque wrench.
• If the ignition coil is faulty, remove it by unbolting and disconnecting the electrical connector.
• Install the new ignition coil and torque it to 8 lb-ft (10.8 Nm).
• Reconnect the electrical connector.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner, injector cleaning kit (if available).
• Disconnect the fuel injector electrical connector.
• Remove the fuel rail and fuel injector for cylinder 1.
• Clean the injector with a cleaning kit or replace it if damaged.
• Reinstall the fuel injector and fuel rail, ensuring all seals are properly seated.

5. Check for Vacuum Leaks

• Inspect all vacuum hoses and the intake manifold for leaks.
• Replace any damaged hoses and ensure the intake manifold is properly sealed.