Volvo V90 oil pressure warning light

Sounds plausible. When the oil pressure warning light lights up, does it flicker or stay on constantly? A faulty sensor can cause this; it's like having a short circuit that gives wrong readings.

It stays on constantly, not flickering. If it's indeed the sensor, is it safe to drive to the workshop, or should I call a tow truck to avoid further damage?

If it stays on, it’s more likely the sensor is sending a constant 'low pressure' signal, like a stuck switch. Better to be safe than sorry; a tow is the wiser choice. Get it checked before you risk engine damage.

Thanks for the advice! You were spot on; it was indeed the engine oil temperature sensor, precisely the cable connection. The repair cost me 95€ Much appreciated!