Hello everyone, I'm the owner of a 2010 Volvo S60 and I've been encountering some rather serious electronic issues that concern me, especially during city drives.

Problem details:

• I first noticed these problems around two months ago.
• The malfunction of the fan was fixed by a private mechanic, not a Volvo specialist.
• On the highway, I seem to have no issues, but during short city commutes, the malfunctions kick in.
• When the problem arises, several warning lights illuminate: DSTC, Engine System, and Power Steering.
• The most concerning part is that when the DSTC light comes on, the car almost completely loses electronic power. This causes the car to move very slowly and in some cases, not turn on at all for certain periods (e.g., it didn't turn on for half an hour yesterday).
• I changed the oil and filters just a week ago, and had a complete check-up at a Volvo dealer around 45 days ago because of these issues. The diagnosis showed numerous anomalies, but the mechanics couldn't pinpoint the cause.

I'm wondering if any of you have had a similar problem or can provide some direction on possible causes and solutions. I'm concerned about safety when driving, especially in the city, as the car can lose power unpredictably.

Thank you in advance for any suggestions or help!