S90 Hybrid starting issue

I'm having a weird issue with my 2018 Volvo S90 hybrid. It's got about 80,000 km on it. Sometimes it just won't start and the check engine light comes on. I've also noticed the gearbox feels a little clunky lately, like it's not shifting as smoothly as it should. Any ideas? I tried checking the usual things, but nothing seems obviously wrong.

4 comment(s)

Those symptoms sound related. Does the gear indicator on the dash light up correctly when you shift into Park? Have you had the car scanned for error codes?

The gear indicator seems normal, but I haven't scanned for codes myself. I'm not sure how to do that. Could the parking position be defective even if the indicator looks okay?

Yes, it's possible. A defective control unit can cause the issues you're describing, leading to transmission failure and errors related to the parking position even if the indicator seems fine. Seeing as the engine doesn't start and the gearbox shifts uncleanly, I expect error codes like these are stored in the error memory. I would recommend taking it to a trusted workshop; the repair may cost around 1000€.

Thanks for the advice. I took it to the shop, and they confirmed it was a faulty control unit related to the transmission parking position, just as you suspected. Appreciate your help!

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