why does my Volkswagen Golf MK7 (2015-2019) engine light flash while driving

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Retrieve and Analyze Codes

• Use an OBD-II scanner to read the engine codes.
• Note any specific codes related to misfires (e.g., P0300-P0304).

3. Inspect and Replace Ignition Components

• Inspect Ignition Coils:

  • Remove engine cover (if applicable) using a socket set.
  • Unplug ignition coil connectors and remove bolts.
  • Inspect coils for cracks or signs of wear.

• Replace Spark Plugs:

  • Use a spark plug socket to remove old spark plugs.
  • Check gaps on new spark plugs and adjust to manufacturer specifications.
  • Install new spark plugs and torque to manufacturer specifications (typically around 15-20 Nm).

4. Check and Repair Fuel System

• Test Fuel Pressure:

  • Connect a fuel pressure gauge to the fuel rail.
  • Turn the ignition on (do not start) and check the pressure against specifications.

• Replace Fuel Filter (if necessary):

  • Relieve fuel system pressure using the Schrader valve.
  • Disconnect fuel lines and replace the filter following manufacturer guidelines.

5. Inspect for Vacuum Leaks

• Perform a Smoke Test:
  • Connect a smoke machine to the intake system and look for smoke escaping.
  • Repair any detected leaks using appropriate sealants or replacement hoses.