I'll give you a quick update on mine. I think my case is rather unique but I am sure there are others that may have experienced similar situations. I have replaced a lot of the same parts you did but the check engine just kept on coming back. I finally went to a different place and I was told that t...

I used this on mine (2010 S80 T6): MulWark 20pc 1/4 Ultra Low Profile Mini Ratchet Wrench Close Quarters Screwdriver Set with High Torque from Amazon:
https://www.amazon.com/gp/product/B07D4 ... UTF8&psc=1
It just barely fit but I was able to unscrew it.

2010 S80 T6 (103K miles) - I am in a similar situation. I changed number of different parts in the last 7 months. I have been using a local shop and that probably has been mistake in itself as they started with most expensive parts but yet were not able to resolve an issue. I gave up on the shop sin...

Thanks cn90...this is exactly the issue I was stuck with and I was able to fix it thanks to your post. I do have another mystery that I am dealing with that I am hoping someone might be familiar with. I have fixed two sets of my door locks by fixing actual actuator motor (I followed this video: http...