Peugeot 308 Undervoltage Issue

Good morning, I'm experiencing an electrical problem with my 2023 Peugeot 308 (electric engine). It has 47935 km. The computer reports an undervoltage, and I'm having a hard time starting the car. The lights are dim, various systems sometimes fail, and the battery seems weak when starting the engine. What could it be?

4 comment(s)

I had a similar issue with my 308. Check the battery terminals for corrosion and ensure they are tight. Also, maybe have the power supply checked: voltage drop, alternator issue?

Thank you for your answer. Where exactly are the battery terminals located, and how can I check the voltage drop accurately? I only have basic tools.

The battery is usually under the bonnet. If you are not comfortable with electrics, I would suggest visiting a workshop and mentioning the possibility of a defective or heavily discharged battery. That's what I did in the end.

You were right about the battery! The workshop confirmed it was defective after testing. New battery installed, and it cost me 290€. No more undervoltage! Thanks for the advice!

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