XC90 start stop issue

Alright, Volvo gurus, I'm pulling my hair out here. My 2018 XC90 gasoline is throwing a fit. The start-stop system is borked. I get an error in the memory, the engine sometimes shuts off when it shouldn't, and there's a persistent warning light taunting me from the speedometer. I've scanned the system – is the battery heavily discharged or defective the most probable cause?

4 comment(s)

Hello. I'm sorry to hear about the issue with your Volvo XC90’s start-stop system. Funnily enough, I had a similar problem with my Mercedes-Benz C-Class. Does the issue occur frequently?

When you say 'similar', how similar are we talking? Did you have the exact same symptoms – error codes, engine stalling, the whole shebang? And what was the culprit in your case?

Indeed! Identical symptoms. Turns out, the auxiliary battery in my Mercedes had given up the ghost. I'd advise a workshop. I do not have the required expertise to help you further.

Thanks. Dropped it off at the shop, and you nailed it – the battery was toast. 290€ later, and it's purring like a kitten again. Appreciate the help!

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