why does my Volkswagen Golf Eighth Generation (2020-present) check engine light keep flashing

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the battery to prevent any electrical shorts.

2. Check and Replace Ignition Components

• Sub-steps:
  • Remove the engine cover (if applicable) using a socket set.
  • Disconnect electrical connectors from each ignition coil.
  • Remove the ignition coils by unscrewing the bolts and pulling them out.
  • Inspect the spark plugs for wear; replace if necessary.
  • Install new ignition coils and secure them with bolts.
  • Reconnect the electrical connectors to each coil.

3. Inspect and Clean Fuel Injectors

• Sub-steps:
  • Locate the fuel rail and relieve fuel pressure by removing the fuel pump fuse and starting the engine until it stalls.
  • Disconnect fuel lines and electrical connectors from the fuel injectors.
  • Remove the fuel injectors from the fuel rail.
  • Use a fuel injector cleaner to clean the injectors or replace them if they are clogged or damaged.
  • Reinstall the injectors, ensuring they are seated properly in the fuel rail.

4. Check Air Intake and Exhaust Systems

• Sub-steps:
  • Inspect the intake manifold for leaks and clean the throttle body if needed.
  • Check the air filter and replace it if it is dirty or clogged.
  • Inspect the exhaust system for any visible leaks or damage; replace any faulty components.

5. Reconnect Battery and Test

• Reconnect the battery terminal and tighten securely.
• Start the engine and let it idle to check for any abnormal sounds or vibrations.