my Skoda Octavia NFL (2020-Present) has a low battery warning, what should I check?

Solution

1. Preparation

• Gather tools: Multimeter, socket set, wire brush, safety glasses, gloves.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the battery by removing the negative terminal first.

2. Inspect Battery Condition

• Use a multimeter to measure the battery voltage (should be at least 12.6 volts).
• If the voltage is low, proceed to recharge or replace the battery.

3. Clean Battery Terminals

• Use a wire brush to clean any corrosion from the battery terminals and connectors.
• Apply battery terminal protector or dielectric grease to prevent future corrosion.

4. Test Alternator Output

• Reconnect the battery terminals and start the engine.
• Measure the voltage at the battery with the engine running; ensure it is between 13.8 to 14.4 volts.
• If the reading is low, replace the alternator.

5. Inspect Serpentine Belt

• Check the condition of the serpentine belt for any signs of wear or cracks.
• If damaged, replace the serpentine belt following the manufacturer's specifications.

6. Check for Parasitic Drain (if necessary)

• Disconnect the negative battery cable and connect a multimeter in series to measure current draw.
• If the current draw exceeds 50 milliamps, investigate individual fuses to identify the source of the drain.