I will keep that in mind, the ones I send you should be legit Bosch. I will first try the tips given in the thread and if that won't help I will gives these a try by replacing all (and also cleaning throttle body).

https://www.ebay.com/itm/Motor-Man-0280 ... SwajVUUUOK

You are right, thanks!! But will take a while though.

Hm sounds interesting. I have to look where in the Netherlands I can get them. Euro parts are usually hard to get here, but easy in Germany for instance.

Thanks for the response! Maybe a noob question, where can I find this schrader valve? I want to try this and see if it can help a little before swapping out the whole injector(s) because they are quite expensive.

@JohnnyBee323 I have the exact same issue with my S60 2.5T AWD as you do. P2178 error, almost always when its hot outside and/or I restart my car when the engine is hot. What I also noticed is that it's really bad when the car is parked at an angle, up hill. Then the car gives the error, start idlin...