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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

1. Remove the engine cover (if applicable) using a socket set.
2. Disconnect the ignition coil connector and remove the ignition coil using a socket wrench.
3. Use a spark plug socket to remove the spark plug from cylinder 1.
4. Inspect the old spark plug for wear; compare it with the manufacturer's specifications for gap and type.
5. Install the new spark plug, ensuring it is gapped correctly.
   • Torque the spark plug to the manufacturer’s specification (usually around 22 lb-ft).
6. Reinstall the ignition coil and reconnect the connector.

3. Replace Ignition Coil (if faulty)

1. If the ignition coil was found faulty, remove it as described above.
2. Install the new ignition coil in place of the old one, ensuring it seats properly.
3. Reconnect the ignition coil connector.

4. Check Fuel Injector

1. If the fuel injector is suspected, remove the fuel rail (ensure fuel pressure is relieved).
2. Inspect and clean the fuel injector, or replace if necessary.
3. Reinstall the fuel rail and reconnect all fuel lines.

5. Verify Compression (if necessary)

1. If compression is low, further inspection may be needed, such as valve or head gasket replacement.
2. Reinstall any components removed during the inspection.