V90 Check Engine Light Air Valve

Alright, I'm getting kinda frustrated. My 2019 Volvo V90 hybrid's throwing a check engine light. Mileage is at 203925 km. Suspect it might be an air valve issue since the light popped up after a slightly rough idle the other day. I've checked for obvious vacuum leaks, like loose hoses, but nothing's jumped out. Any ideas where else to look?

4 comment(s)

Hmm, check engine light with a possible air valve issue on a hybrid... could be a small vacuum leak. Are you noticing any other symptoms besides the light? Like, is the idle consistently rough, or just occasionally?

Just occasionally, that's what's weird. The light's on solid now, though. Thinking maybe it's the hose connection from the pump to the valve itself? Any thoughts on how to get to that?

If it's intermittent, it's likely a small leak. The hose connection sounds like a good place to start, but honestly, those things can be tricky to pinpoint without proper equipment. Maybe best to have a workshop take a peek, especially with the hybrid system involved.

Yeah, you're probably right. Bit the bullet and took it in. Turns out the hose connection from pump to valve was indeed defective, just like I thought. Repair cost me 175€ Thanks for the advice!

Join the discussion now: