what does code B1A00 mean in my Volkswagen Golf Eighth Generation (2020-present)

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, and a battery terminal cleaner.
• Disconnect the negative terminal of the auxiliary battery to ensure safety while working on electrical components.

2. Inspect and Clean Battery Connections

• Sub-steps:
  1. Remove the cover of the auxiliary battery if applicable.
  2. Use the battery terminal cleaner to clean any corrosion from the battery terminals.
  3. Tighten the battery connections securely using a socket set to prevent future issues.

3. Test and Replace Auxiliary Battery (if necessary)

• Sub-steps:
  1. If the voltage reading from the multimeter is below 12.4V, consider replacing the auxiliary battery.
  2. Disconnect the old battery by removing the positive terminal first, followed by the negative terminal.
  3. Install the new battery by connecting the positive terminal first, followed by the negative terminal.
  4. Ensure all connections are tight and secure.

4. Clear Error Codes

• Sub-steps:
  1. Reconnect the negative terminal of the auxiliary battery.
  2. Use the OBD-II scanner to clear the B1A00 code from the vehicle’s system.
  3. Start the vehicle to verify that the warning light does not reappear.