Volkswagen Golf Seventh Generation (2013-2020) check engine light flashing what does it mean

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a level surface and turn off the engine.
• Disconnect the battery to prevent electrical shock.

2. Inspect and Replace Spark Plugs

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coils by unscrewing them from the cylinder head.
• Remove the spark plugs using a spark plug socket.
• Inspect for wear or damage; if worn, replace with new OEM spark plugs.
• Torque the new spark plugs to the manufacturer’s specifications (typically around 20 Nm).

3. Check Ignition Coils

• Tools Required: Multimeter.
• Test each ignition coil for resistance using a multimeter. Refer to the specifications in the service manual.
• Replace any ignition coils that do not meet specifications.

4. Inspect for Vacuum Leaks

• Tools Required: Smoke machine (optional), hose clamps.
• Visually inspect all hoses connected to the intake manifold and throttle body.
• Use a smoke machine to detect vacuum leaks if necessary.
• Replace any damaged hoses or seals found during inspection.

5. Fuel System Inspection

• Tools Required: Fuel pressure gauge.
• Connect the fuel pressure gauge to the fuel rail and turn the ignition to the "on" position without starting the engine.
• Verify the fuel pressure is within the manufacturer’s specifications (usually around 50-60 psi).
• If pressure is low, check for clogged filters or failing fuel pumps and replace as necessary.

6. Reconnect Battery and Clear Codes

• Reconnect the battery terminals.
• Use the OBD-II scanner to clear any diagnostic trouble codes.
• Start the engine and ensure the check engine light does not re-illuminate.