Modus weak battery and flickering lights

I had a similar issue with my Modus. Weak battery, lights acting up... It could very well be the battery sensor. Have you checked the battery voltage while the engine is running? What readings are you getting?

Thanks for the quick reply! I haven't checked the voltage while the engine is running, but I did test it when the engine was off and it seemed normal. What kind of readings were you getting when you had the problem?

If the voltage is normal with the engine off, but you're seeing issues when it's running, it really points to the sensor not regulating the charge properly. I'd suggest taking it to a workshop to get it properly diagnosed. In my case, the sensor was indeed faulty and needed replacement.

Thanks a lot for the advice! I took it to the workshop, and you were spot on. The battery sensor was defective. The replacement cost me 315€, but now it's running smoothly again. I appreciate your help!