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

Solution

1. Preparation

• Gather tools and parts necessary for repair.
• Disconnect the vehicle's battery to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Replace Spark Plug

• Remove the ignition coil from cylinder 1:
  • Unscrew the retaining bolt (if applicable) and pull the coil straight out.
• Remove the spark plug using a spark plug socket:
  • Turn counterclockwise to remove the spark plug.
• Inspect the old spark plug for wear or damage.
• Install the new spark plug:
  • Apply a small amount of anti-seize compound to the threads (optional).
  • Torque to manufacturer specifications (usually around 20 Nm).
• Reinstall the ignition coil, ensuring it clicks into place.

3. Replace Ignition Coil (if necessary)

• If the ignition coil was found faulty during inspection:
  • Remove the old ignition coil as in Step 2.
  • Install the new ignition coil.
  • Ensure all electrical connections are secure.

4. Test Fuel Injector

• If the fuel injector was found faulty in the diagnostic steps:
  • Disconnect the fuel injector connector.
  • Use a multimeter to check resistance; replace if out of specification.
  • Reinstall the new or repaired fuel injector.

5. Clear Codes and Test Drive

• Reconnect the battery.
• Use the OBD-II scanner to clear the P0301 code.
• Start the engine and monitor for any further misfires during a test drive.