how to fix P0301 code on my Volkswagen Golf Eighth Generation (2020-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool down.

2. Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench, dielectric grease.
• Remove the ignition coil from cylinder 1 by unscrewing the retaining bolts.
• Disconnect the electrical connector from the ignition coil.
• Remove the spark plug using the spark plug socket.
• Inspect the old spark plug for signs of wear or fouling.
• Install the new spark plug, ensuring it is gapped to manufacturer specifications. Torque it to the specified value (usually around 20 Nm).
• Apply dielectric grease to the ignition coil boot before reinstallation.

3. Replace Ignition Coil

• Tools Required: Ratchet, socket set.
• After removing the spark plug, install the new ignition coil onto cylinder 1.
• Reconnect the electrical connector securely.
• Secure the ignition coil with retaining bolts to the manufacturer’s torque specifications.

4. Clear Codes and Test

• Use the OBD-II scanner to clear the P0301 code from the ECU.
• Reconnect the battery.
• Start the engine and let it idle to check for smooth operation.
• Monitor the engine performance and check for the check engine light reappearing.