my Volkswagen Golf MK7 (2015-2019) engine light is flashing, what's happening?

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, multimeter, torque wrench, and vacuum gauge.
• Ensure the vehicle is parked on a level surface and the engine is cool.

2. Address Faulty Spark Plugs

1. Disconnect the negative battery terminal to prevent electrical shorts.
2. Remove the engine cover if applicable.
3. Remove spark plug wires or ignition coils carefully.
4. Use a spark plug socket to remove the spark plugs.
5. Inspect each spark plug for wear or fouling; replace if necessary.
6. Gap the new spark plugs according to manufacturer specifications (usually around 0.028 - 0.032 inches).
7. Install the new spark plugs and torque them to the manufacturer's specification (typically around 15-20 lb-ft).

3. Replace Ignition Coils (if necessary)

1. If any ignition coils are faulty, remove them by unscrewing the mounting bolts.
2. Disconnect the electrical connectors from the ignition coils.
3. Install new ignition coils and reconnect the electrical connectors.
4. Torque the ignition coils according to specifications.

4. Check Fuel Injectors

1. Remove the fuel rail (ensure to relieve fuel pressure beforehand).
2. Inspect fuel injectors for clogs or leaks; clean or replace as necessary.
3. Reinstall the fuel rail and ensure all connections are secure.

5. Inspect for Vacuum Leaks

1. Conduct a visual inspection of vacuum hoses and connections for cracks or disconnections.
2. Use a vacuum gauge to test engine vacuum; compare readings to specifications.
3. Replace any damaged hoses or components found during the inspection.