my Skoda Octavia NFL (2020-Present) battery keeps overcharging what’s wrong

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the negative terminal of the battery to prevent electrical shock.

2. Inspect and Replace the Voltage Regulator

• Locate the alternator and identify the voltage regulator (either internal or external).
• If external, disconnect the wiring harness and remove the voltage regulator using the appropriate socket set.
• Compare the old voltage regulator with the new one to ensure compatibility.
• Install the new voltage regulator by reversing the removal steps and securely reconnecting the wiring harness.

3. Test the Alternator

• Reconnect the negative battery terminal.
• Start the engine and use the multimeter to measure the voltage output at the battery terminals.
• If the voltage is still above 14.7 volts, the alternator may need replacing.
• To replace the alternator, disconnect the battery again, remove the drive belt, and unbolt the alternator from its mount. Install the new alternator by reversing these steps.

4. Battery Inspection

• Inspect the battery for signs of swelling or leakage.
• If damage is evident, safely remove the battery using a wrench to disconnect the terminals (negative first, then positive).
• Replace with a new battery of the same specifications and ensure it is securely installed.

5. Final Checks

• Reconnect the battery terminals (positive first, then negative).
• Start the vehicle and monitor the battery voltage again, ensuring it remains within the normal range.