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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.

2. Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench
• Remove the ignition coil from cylinder 1 by unscrewing the retaining bolts and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket.
• Inspect the old spark plug for wear (e.g., electrode erosion, carbon buildup).
• Install the new spark plug by hand to avoid cross-threading, then torque to the manufacturer’s specifications (typically around 20-30 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 was damaged during inspection, remove it as described above.
• Install the new ignition coil, ensuring it is seated properly on the new spark plug.
• Torque the ignition coil bolts to manufacturer specifications.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner kit, safety goggles
• If the fuel injector was found to be faulty, remove it from the fuel rail.
• Clean the fuel injector using a fuel injector cleaning kit according to the manufacturer's instructions.
• Reinstall the injector and ensure all O-rings are intact to prevent leaks.

5. Final Assembly and Testing

• Reconnect the battery.
• Start the engine and let it idle to check for any misfires or abnormalities.
• Re-scan for codes to ensure the P0301 code is cleared.