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

Solution

1. Preparation

• Gather the necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.

2. Replace Spark Plugs

• Tools Required: Socket set, torque wrench, spark plug socket.
• Sub-steps:
  1. Disconnect the negative battery terminal to prevent electrical shorts.
  2. Remove the engine cover if applicable to access the spark plugs.
  3. Use a spark plug socket to carefully unscrew and remove each spark plug.
  4. Inspect the old spark plugs for signs of wear or fouling.
  5. Install the new spark plugs, tightening to the manufacturer’s specified torque (typically 15-20 lb-ft).
  6. Reconnect the engine cover if applicable and reconnect the battery terminal.

3. Check and Replace Air Filter

• Tools Required: None specifically, but a flathead screwdriver may be needed for clips.
• Sub-steps:
  1. Open the air filter housing by removing any clips or screws.
  2. Take out the old air filter and inspect it for dirt or blockages.
  3. Clean the housing with a damp cloth to remove any debris.
  4. Insert the new air filter, ensuring a proper fit, and reassemble the housing.

4. Inspect and Replace Fuel Filter (if applicable)

• Tools Required: Wrench set, fuel line disconnect tool (if needed).
• Sub-steps:
  1. Relieve fuel system pressure using the fuel pump relay or fuse.
  2. Disconnect the negative battery terminal.
  3. Locate the fuel filter and disconnect the fuel lines using the appropriate tools.
  4. Remove the old fuel filter and install the new one, ensuring correct flow direction.
  5. Reconnect the fuel lines and battery terminal.