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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shocks.
• Allow the engine to cool down completely.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if necessary.
• Disconnect the ignition coil connector from the spark plug.
• Remove the spark plug using the spark plug socket and ratchet.
• Inspect the spark plug for signs of wear or damage; replace if necessary.
• Install the new spark plug and torque it to the manufacturer's specification (typically around 20 Nm).
• Reconnect the ignition coil.

3. Check and Replace Ignition Coil

• If spark plug is fine, inspect the ignition coil.
• Remove the ignition coil from cylinder 1.
• Test the ignition coil with a multimeter to check for proper resistance (consult service manual for specifications).
• If faulty, replace with a new ignition coil.
• Reinstall the ignition coil and reconnect its electrical connector.

4. Inspect and Clean Fuel Injector

• Disconnect the fuel injector connector.
• Remove the fuel injector from cylinder 1 (may require removal of the intake manifold).
• Clean the fuel injector using a specialized injector cleaner or replace it if necessary.
• Reinstall the fuel injector and reconnect the connector.

5. Compression Test

• Attach a compression gauge to the spark plug hole of cylinder 1.
• Crank the engine and note the compression reading.
• Compare the reading with the specifications for normal operation (typically between 120-200 psi).
• If compression is low, this may indicate internal engine issues needing further inspection.