Tourneo Weak Battery and Flickering Lights

I had similar issues with my Tourneo. The symptoms you describe sound very familiar. Have you had the battery tested? It could be a faulty voltage sensor causing those problems and leading to insufficient charging.

Thanks for the quick reply! I haven't had the battery tested yet, but I was wondering if it could be the alternator. Is it possible it could be the voltage sensor? Where is that located, and is it easy to test? Is it common for those sensors to fail?

It's certainly possible it could be the alternator, but the symptoms really point towards a faulty battery sensor in my experience. I ended up having it checked out at a workshop, who confirmed the sensor was defective. They replaced it, and the problem was solved. Saved me from buying a new battery or alternator unnecessarily. I would recommend having a pro diagnose it.

Okay, great. I appreciate the advice! It's good to know someone else had a similar experience. I'll take it to a workshop and have them check the battery sensor specifically. Thanks again for the help; saves me a lot of time going straight to the likely issue. The repairs did cost 315€, but at least it's sorted.