my Skoda Octavia NFL (2020-Present) engine light is on, how do I diagnose it?

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, multimeter, torque wrench, and basic hand tools.
• Ensure the vehicle is parked on a level surface with the engine off and cool.

2. Retrieve and Analyze Error Codes

• Connect the OBD-II scanner to the vehicle's diagnostic port.
• Turn on the ignition without starting the engine.
• Read and record any error codes that are displayed.
• Refer to the vehicle’s service manual to interpret the codes.

3. Address Identified Issues

• If error codes indicate misfire, check spark plugs and ignition coils. Replace if necessary.
• For sensor-related codes (e.g., oxygen sensor), inspect and replace faulty sensors.
• If codes relate to the fuel system, check fuel pressure using a fuel pressure gauge and replace the fuel filter if needed.

4. Clear Codes and Test

• After addressing the issues, clear the codes using the OBD-II scanner.
• Start the engine and allow it to idle for a few minutes.
• Monitor the engine operation for any signs of issues.

5. Final Inspection

• If the check engine light remains off, perform a road test to ensure the issue is resolved.
• Recheck for any new error codes after the test drive.