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

Solution

1. Preparation

• Gather tools and parts: OBD-II scanner, socket set, torque wrench, multimeter, compression tester, replacement spark plug, ignition coil, and fuel injector (if necessary).
• Disconnect the battery to prevent electrical shorts and ensure safety.

2. Replace Spark Plug

1. Remove the engine cover if applicable.
2. Disconnect the ignition coil connector from the coil in cylinder 1.
3. Unscrew the ignition coil from the cylinder head using a socket.
4. Remove the old spark plug using a spark plug socket and ratchet.
5. Inspect the spark plug for signs of fouling or wear.
6. Install the new spark plug by hand, then torque it to the manufacturer’s specification (typically 20 Nm).
7. Reinstall the ignition coil and reconnect the connector.

3. Replace Ignition Coil (if faulty)

1. Follow steps 1-3 from the Replace Spark Plug section.
2. Remove the ignition coil and inspect for cracks or carbon tracking.
3. Install the new ignition coil by reversing the removal process, ensuring it is securely fastened.
4. Reconnect the ignition coil connector.

4. Test Fuel Injector (if needed)

1. Ensure the vehicle is turned off and the battery is disconnected.
2. Remove the fuel injector connector from cylinder 1.
3. Use a multimeter to verify the resistance of the injector (should be within specifications, typically around 12-16 Ohms).
4. If the injector is faulty, replace it by removing the fuel rail and replacing the injector.
5. Reinstall the fuel rail and reconnect all necessary connectors.

5. Reassemble

• Reinstall the engine cover if removed.
• Reconnect the battery.
• Clear the diagnostic trouble codes using the OBD-II scanner.