victoriaschmid6
XC90 High Voltage System Error
Summary of the thread
A 2021 Volvo XC90 hybrid is experiencing a high-voltage system error, causing the engine to sometimes shut off and reduced engine power. The issue may stem from a faulty voltage sensor, a battery problem, or an inverter issue. A similar case with a BMW involved a faulty sensor, suggesting a check by a qualified technician. Ultimately, the problem was resolved by replacing a heavily discharged and defective high-voltage battery.
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4 comment(s)
victoriaschmid6 (community.author)
Interesting. No, I haven't observed any unusual electrical behavior specifically. What was the resolution for your BMW? Did it involve the high-voltage battery pack itself, or something else?
sven_fire2
In my case, it was a faulty voltage sensor causing a false reading, which led to the system shutting down as a safety measure. The dealer replaced the sensor, and it solved the problem. Given your Volvo is showing similar signs, I'd suggest getting it checked out by a qualified technician. It could be a battery issue, an inverter problem, or even just a sensor malfunction. Better safe than sorry with high-voltage systems.
victoriaschmid6 (community.author)
Thanks for the advice! I took it to a workshop, and you were right – the high-voltage battery was heavily discharged and defective. Replacing it and performing some associated work cost me 290€, but it fixed the issue. I appreciate the pointer!
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VOLVO
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XC90
sven_fire2
That sounds familiar. I had a similar problem with my 2019 BMW 530e. It turned out to be a battery drain issue that was triggering all sorts of weird errors. Did you notice any unusual electrical behavior before the errors started?