Laguna Electrical Issues

I had a similar issue with my Laguna recently. It turned out to be the battery sensor. Have you checked the voltage readings from the sensor itself? A faulty sensor can give incorrect data to the car's computer, leading to charging problems and those symptoms you describe.

Thank you for your reply! I haven't specifically checked the voltage readings from the sensor. Where exactly is the battery sensor located, and is it something I can test with a multimeter, or does it require specialized equipment?

The battery sensor is usually attached directly to the negative terminal of the battery. While you might be able to get a basic voltage reading with a multimeter, interpreting the data accurately requires knowing the expected values under different load conditions. It might be best to take it to a workshop for proper diagnostics. They can perform a battery test and check the sensor readings with specialized equipment. Could save you a lot of time and potential misdiagnosis.

Much appreciated! I took your advice and brought the Laguna to a trusted mechanic. It was indeed the battery sensor. They replaced it, and after the labor costs, the total came to 315€. No more weak starts or flickering lights! Thanks again for pointing me in the right direction.