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

Solution

1. Preparation

• Gather required tools and parts.
• Ensure the engine is cool and disconnect the battery to avoid electrical shock.

2. Inspect and Replace Spark Plug

• Remove the engine cover (if applicable) using a socket set.
• Disconnect the ignition coil connector on cylinder 1.
• Remove the ignition coil using a socket wrench.
• Remove the spark plug from cylinder 1 using a spark plug socket.
• Inspect the spark plug for wear; if it is worn or fouled, replace it with a new OEM spark plug, ensuring the gap is set to manufacturer specifications.
• Reinstall the spark plug and ignition coil, reconnecting the connector securely.

3. Check and Replace Ignition Coil

• If the spark plug is in good condition, test the ignition coil using a multimeter.
• If the ignition coil fails the test, replace it with a new OEM ignition coil for cylinder 1.
• Reinstall the ignition coil and ensure all connections are tight.

4. Compression Test (if needed)

• If misfire persists, conduct a compression test on cylinder 1.
• If compression is low, further investigation may be necessary (valve issues, head gasket failure, etc.).

5. Fuel Injector Inspection (if needed)

• If previous steps do not resolve the issue, check the fuel injector for cylinder 1.
• Remove the injector and inspect it for blockages; clean or replace as necessary.

6. Reconnect Battery and Test

• Reconnect the battery and erase the fault codes using the OBD-II scanner.
• Start the engine and observe for any check engine light reappearance.