oliverbraun1
XC40 Automatic Transmission Implausible Shifting
Summary of the thread
A 2020 Volvo XC40 with 35,572 km is experiencing issues with its automatic transmission, including implausible shifting, a transmission indicator light, and emergency mode activation. The problem may be caused by an undervoltage issue affecting the transmission's electronic controls. Checking the battery and alternator for undervoltage was suggested, and addressing this resolved the transmission issues.
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4 comment(s)
oliverbraun1 (community.author)
Undervoltage, huh? That's interesting. I wouldn't have thought of that. How would that affect the automatic gearbox? And what exactly did you experience with your transmission problems?
philippkoehler1
Yeah, apparently undervoltage can mess with the transmission's electronic controls. My auto gearbox was shifting erratically. It's worth getting it checked, though. Could be a simple fix, but best to get it looked at before it causes more damage.
oliverbraun1 (community.author)
Took the XC40 to the shop. Turns out it was indeed an undervoltage issue messing with the transmission. They sorted it out. Cost me 240€ for the diagnostics and fix. Thanks for the tip!
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VOLVO
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XC40
philippkoehler1
Sounds familiar. I had similar transmission performance issues with my XC40, although it presented a bit differently. Is it possible you've got undervoltage issues? Have you checked the battery and alternator?