XC90 Engine Stalling

That sounds eerily similar to what happened with my old Audi A4 – different car, I know. But, same symptoms: check engine light, rough idling. Did you happen to check the hoses connected to the tank ventilation valve? Those were clogged in my case, throwing off the pressure sensor.

Interesting. When you say hoses, are you talking about the ones directly connected to the valve itself, or further down the line? Was it obvious they were clogged, or did you have to dig around to find the problem?

Yeah, the ones right at the valve. Hard to see at first, but once I disconnected them, it was clear as day. Honestly, unless you're super comfortable wrenching, I'd get it to a shop. Could be other things, but clogged hoses on the ventilation system were definitely my issue.

Took it to the shop, and they confirmed it was the tank ventilation valve, specifically clogged hoses. Repair cost me around 175€ Thanks for the insight!