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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down before starting work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if applicable.
• Locate and disconnect the ignition coil connector for cylinder 1.
• Remove the ignition coil by unscrewing it and pulling it out.
• Remove the old spark plug using a spark plug socket.
• Install the new spark plug, ensuring it is properly gapped (refer to manufacturer specifications).
• Torque the spark plug to the manufacturer's specification (usually around 20-25 Nm).
• Reinstall the ignition coil and connector.

3. Inspect and Replace Ignition Coil (if needed)

• If the ignition coil shows signs of damage (cracks, discoloration), replace it with a new one.
• Tools Required: Socket set.
• Remove the ignition coil as described above and install the new coil.
• Reconnect the coil connector.

4. Check and Replace Fuel Injector (if needed)

• If the injector is faulty, remove it for inspection.
• Tools Required: Fuel injector removal tool, socket set.
• Disconnect the fuel line and electrical connector from the injector.
• Remove the fuel rail bolts and carefully pull the fuel rail with the injector out.
• Replace the faulty injector with a new one, ensuring proper sealing and connection.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0301 code.