my Skoda Octavia NFL (2020-Present) battery dies overnight, what could be draining it?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked in a safe area and has cooled down.
• Disconnect the negative battery terminal to avoid any electrical shocks.

2. Inspect Battery and Connections

• Tools Required: Wrench set, wire brush
• Clean any corrosion from battery terminals using a wire brush.
• Tighten any loose battery connections.
• Reconnect the battery and check if the issue persists.

3. Measure Parasitic Draw

• Tools Required: Multimeter, ammeter
• Reconnect the negative battery terminal.
• Disconnect the negative terminal again and connect the ammeter in series.
• Check the amperage draw and ensure it is below 50 mA. If it exceeds this value, proceed to the next steps.

4. Identify the Faulty Circuit

• Tools Required: Multimeter, fuses puller
• Pull one fuse at a time while monitoring the amperage on the ammeter.
• Note the fuse that, when removed, causes the amperage draw to fall below 50 mA.
• Investigate the circuit associated with that fuse for faulty components.

5. Repair or Replace Faulty Components

• Tools Required: Socket set, screwdrivers, replacement parts as needed
• Replace any malfunctioning components identified in the previous step (e.g., switches, modules).
• Ensure all connections are secure and reassemble any disassembled components.