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

Solution

1. Preparation

• Gather required tools and parts.
• Disconnect the negative terminal of the battery to ensure safety.
• Allow the engine to cool down before starting work.

2. Replace Spark Plug

• Remove the ignition coil from cylinder 1:
  • Unplug the electrical connector from the ignition coil.
  • Use a socket wrench to remove the bolt securing the ignition coil.
  • Gently pull the ignition coil straight out.
• Remove the spark plug:
  • Use a spark plug socket to unscrew the spark plug from cylinder 1.
  • Inspect the old spark plug for signs of wear, carbon buildup, or damage.
• Install the new spark plug:
  • Apply a small amount of anti-seize compound to the threads of the new spark plug.
  • Torque the spark plug to the manufacturer’s specifications (usually around 22 ft-lbs).
• Reinstall the ignition coil:
  • Align it over the spark plug and press down until it clicks into place.
  • Secure it with the bolt and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil (if necessary)

• If the ignition coil shows signs of wear or if the spark plug replacement didn't resolve the issue, replace the ignition coil:
  • Follow the same steps as above for removing and reinstalling the ignition coil.
  • Ensure the new ignition coil is compatible with the OEM specifications.

4. Check Fuel Injector

• If misfire persists, test the fuel injector for cylinder 1:
  • Disconnect the fuel injector connector.
  • Use a multimeter to check the resistance; it should be within the manufacturer’s specified range.
  • If necessary, replace the fuel injector using the same removal and installation procedure as above.