what does the check engine light mean on my Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Address Error Codes

• Sub-step 1: Use the OBD-II scanner to retrieve and record error codes.
• Sub-step 2: Research the error codes to determine the affected systems.

3. Replace Faulty Components

• Sub-step 1: If codes point to a specific component (e.g., oxygen sensor), locate the component.
• Sub-step 2: Disconnect the electrical connector and remove the component using the appropriate socket.
• Sub-step 3: Install the new component, ensuring all connections are secure.
• Sub-step 4: Reconnect the negative battery terminal.

4. Reset the Check Engine Light

• Sub-step 1: Use the OBD-II scanner to clear the error codes and reset the check engine light.
• Sub-step 2: Start the engine to check if the light remains off.

5. Final Inspection

• Sub-step 1: Inspect all replaced components for proper installation.
• Sub-step 2: Conduct a test drive to ensure the vehicle operates normally without the check engine light re-illuminating.