why does my Skoda Octavia's check engine light keep coming on?

Solution

1. Preparation

• Gather tools and parts needed for repairs.
• Disconnect the negative terminal of the battery to avoid electrical shorts.

2. Replace Faulty Components

A. Spark Plugs

1. Remove the ignition coil cover if applicable.
2. Unscrew and remove old spark plugs using a socket wrench.
3. Inspect the old spark plugs for signs of damage or wear.
4. Install new spark plugs, ensuring they are gapped correctly (typically 0.7 mm to 0.9 mm for Skoda engines).
5. Torque the new spark plugs to manufacturer specifications (usually around 20 Nm).

B. Fuel Filter Replacement (if clogged)

1. Locate the fuel filter (usually along the fuel line).
2. Relieve fuel system pressure by removing the fuel pump fuse and starting the engine until it stalls.
3. Disconnect the fuel lines from the filter (be prepared for fuel spillage).
4. Remove the mounting bolts and take out the old fuel filter.
5. Install the new fuel filter, ensuring the flow direction matches the markings.
6. Reconnect the fuel lines securely and reinsert the fuel pump fuse.

3. Check for Vacuum Leaks

1. Start the engine and use a smoke machine or carburetor cleaner to check for leaks around the intake manifold and vacuum hoses.
2. Replace any damaged hoses or gaskets as needed.

4. Reconnect Battery

• Reconnect the negative battery terminal.
• Clear any existing error codes using the OBD-II scanner.