V90 Weak Battery

I have a 2020 Volvo V90 diesel. The battery seems weak on ignition, especially when it's cold. The interior lights flicker sometimes, like there's a voltage problem. I'm thinking it might be the battery sensor. Does that sound right, or should I look at other things? It has 57720 km on it.

4 comment(s)

I had something similar on my V90. Weak starts, lights acting funky – sounds like a battery issue for sure. Did you check the voltage regulator or alternator output? Sometimes those can cause the sensor to throw false positives. It's like blaming the messenger for a bad message!

Thanks, good point about the messenger. I haven't checked the voltage regulator or alternator as closely as the battery sensor. How did you check those? Any specific voltage ranges or codes I should look for?

Honestly, I just took it to a good shop after checking for loose connections. They hooked it up to their stuff and found a bad battery sensor in like, 10 minutes. Cost me about 315€ to replace. Saved me a ton of time with a multimeter. Plus, they guaranteed the work.

Thanks. Based on what you said, I'll get it checked by a workshop. That repair cost gives me a good idea what to expect. It was a defective battery sensor, repair cost 315€.

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