my Volkswagen Passat B8 (2015-2022) has warning lights on the dashboard what do they mean

Solution

1. Preparation

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

2. Read and Interpret Diagnostic Codes

• Connect an OBD-II scanner to the vehicle's diagnostic port.
• Turn on the ignition without starting the engine to power the scanner.
• Retrieve and record the error codes displayed on the scanner.

3. Address Identified Issues

• Use the error codes to identify specific components that may need attention.
• Based on the codes retrieved, perform necessary repairs or replacements such as:
  • Engine issues: Replace faulty sensors, such as MAF or O2 sensors.
  • Brake system: Check and replace brake fluid if low or contaminated; inspect brake pads and rotors.
  • Battery issues: Clean terminals and check the battery's health; replace if necessary.

4. Clear Diagnostic Codes

• After completing repairs, reconnect the OBD-II scanner.
• Select the option to clear the diagnostic trouble codes (DTCs).
• Confirm that the codes have been successfully cleared.

5. Test Drive

• Start the vehicle and monitor the dashboard for any returning warning lights.
• Conduct a test drive to ensure all systems are functioning properly.