mikashadow1
Volvo S90 Inlet VANOS Defect
Summary of the thread
A 2021 Volvo S90 owner is experiencing issues with the inlet VANOS mechanics, indicated by an illuminated check engine light and increased fuel consumption. The problem could be due to a defect in the camshaft solenoid valves or a power supply interruption. After consulting with others and visiting a workshop, it was confirmed that a defect in one of the camshaft solenoid valves was the cause, and it was subsequently replaced.
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4 comment(s)
mikashadow1 (community.author)
Interesting. Was your BMW also reporting a fault specifically related to the inlet camshaft? And were there any other symptoms besides the check engine light and fuel consumption?
marvinfuchs18
Yes, the error codes pointed towards the inlet camshaft. Beyond the light and the fuel, I noticed some rough idling from time to time. Given your Volvo's mileage and the symptoms, I strongly advise having a workshop check the inlet camshaft and timing chain.
mikashadow1 (community.author)
Thank you for the information. I took your advice and visited a workshop. As suspected, there was a defect in one of the camshaft solenoid valves, which has been replaced. The repair cost 250€.
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VOLVO
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S90
marvinfuchs18
That does sound like a potential VANOS issue. I had a similar problem with my old BMW 5 Series. Same symptoms: check engine light and increased fuel consumption. In my case, it ended up being a faulty camshaft position sensor throwing everything off.