how to fix P0301 misfire code in my Volkswagen Golf MK7.5 (2020-Present)?

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 prevent accidental electrical shorts.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, dielectric grease.
• Remove the engine cover if applicable.
• Disconnect the ignition coil connector for cylinder 1.
• Remove the ignition coil using a socket.
• Unscrew the spark plug using a spark plug socket.
• Inspect the spark plug for wear; replace if necessary with a new spark plug that meets manufacturer specifications.
• Apply a small amount of dielectric grease to the ignition coil connector.
• Reinstall the spark plug and torque to the manufacturer's specifications (usually around 20-30 Nm).
• Reinstall the ignition coil and reconnect the connector.

3. Check and Replace Ignition Coil (if necessary)

• Tools Required: Socket set.
• If the ignition coil is found to be faulty during inspection, remove it as described above.
• Install the new ignition coil, ensuring it is seated properly.
• Reconnect the ignition coil connector.

4. Inspect Fuel Injector

• Tools Required: Fuel injector puller (if needed).
• Disconnect the fuel injector connector for cylinder 1.
• Remove the fuel rail if necessary to access the injector.
• Inspect the fuel injector for clogs or damage; replace if necessary.
• Reinstall the fuel rail (if removed) with the proper torque specifications.

5. Recheck Connections and Vacuum Leaks

• Inspect all connectors and wiring related to the ignition system and fuel injector for any signs of wear or damage.
• Use a smoke machine or carb cleaner to check for vacuum leaks around the intake manifold and hoses. Repair any leaks found.