my Skoda Octavia NFL (2020-Present) has a check engine light and a rough idle

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle battery to ensure safety.
• Allow the engine to cool before starting work.

2. Addressing Error Codes

• Connect the OBD-II scanner and retrieve error codes.
• Note down the codes for reference; clear them after repairs to reset the check engine light.

3. Inspect and Replace Spark Plugs

• Remove the ignition coil covers using a socket set.
• Carefully extract the ignition coils and spark plugs.
• Inspect spark plugs for wear (electrode condition, carbon buildup).
• Replace spark plugs with manufacturer-recommended parts.
• Reinstall ignition coils and covers, torque to manufacturer specifications.

4. Fuel System Inspection

• If applicable, replace the fuel filter.
• Remove and inspect fuel injectors for clogs or leaks.
• Clean or replace fuel injectors as necessary using a fuel injector cleaning kit.

5. Throttle Body Cleaning

• Remove the air intake hose connected to the throttle body.
• Use throttle body cleaner and a soft cloth to clean the throttle plate and surrounding areas.
• Reattach the air intake hose securely.

6. Final Assembly

• Reconnect the battery.
• Start the engine and allow it to reach operating temperature.
• Monitor for any abnormal noises or signs of rough idle.