how to fix P0301 code on my Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.

2. Inspect and Replace Spark Plug

1. Remove the ignition coil cover if present.
2. Disconnect the electrical connector from the ignition coil of cylinder 1.
3. Remove the ignition coil using a socket wrench.
4. Remove the spark plug using a spark plug socket.
5. Inspect the spark plug for wear or damage; replace if necessary.
6. Install the new spark plug, torque to 20 Nm (15 ft-lbs).
7. Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil

1. If the spark plug is fine, test or replace the ignition coil.
2. Remove the ignition coil from cylinder 1 as previously described.
3. Install the new ignition coil, ensuring it fits snugly.
4. Reconnect the electrical connector.

4. Inspect and Replace Fuel Injector (if necessary)

1. If misfire persists, inspect the fuel injector for cylinder 1.
2. Disconnect the fuel injector connector.
3. Remove the fuel rail if necessary to access the injector.
4. Replace the fuel injector, ensuring proper orientation and sealing.
5. Reassemble the fuel rail and reconnect all connectors.

5. Clean or Repair Wiring/Connectors

1. Inspect wiring and connectors for corrosion, damage, or loose connections.
2. Clean connectors with electrical contact cleaner or replace damaged wiring as needed.