why does my Volkswagen Golf Seventh Generation (2013-2020) check engine light keep coming on

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, torque wrench, multimeter, and basic hand tools.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Address Fault Codes

• Use the OBD-II scanner to retrieve and document any trouble codes.
• Research the codes to determine potential issues and necessary repairs.

3. Inspect and Replace Components

A. Gas Cap

• Check the gas cap for cracks or damage.
• If faulty, replace it with a new OEM or quality aftermarket gas cap.

B. Spark Plugs and Ignition Coils

• Remove the ignition coils using a socket wrench.
• Inspect spark plugs for wear, and replace them if they show signs of excessive wear or fouling.
• Install new spark plugs and reattach the ignition coils.

C. Vacuum Leaks

• Inspect all vacuum hoses for cracks or disconnections.
• Replace any damaged hoses with new ones, ensuring they are correctly secured.

4. Final Assembly

• Reconnect the negative battery terminal.
• Ensure all tools and materials are cleared from the workspace.