how to diagnose the warning lights on my Skoda Octavia NFL (2020-Present) dashboard?

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a level surface and engage the parking brake.

2. Retrieve and Analyze Codes

• Tools Required: OBD-II scanner
• Connect the OBD-II scanner to the vehicle's diagnostic port.
• Turn the ignition to the ON position without starting the engine.
• Retrieve any stored codes and write them down for analysis.

3. Address Specific Codes

• Based on the error codes retrieved, focus on specific components or systems (e.g., replace faulty sensors, fix wiring issues).
• Example: If a “P0420” code (Catalytic Converter Efficiency Below Threshold) is present, inspect the exhaust system for blockages or leaks and consider replacing the catalytic converter if necessary.

4. Fluid Replacement (if needed)

• Tools Required: Fluid pump, funnel, wrench set
• If any fluid levels are low, drain the old fluid and replace it with the recommended fluid type as per the owner's manual.
• Check for leaks after fluid replacement.

5. Battery Maintenance

• Tools Required: Multimeter, battery terminal cleaner
• Clean battery terminals to remove corrosion.
• If the battery voltage is low, charge or replace the battery as necessary.

6. Clear Codes

• After addressing the issues, use the OBD-II scanner to clear the error codes.
• Perform a test drive to verify that the warning lights do not reappear.