Thank you for the clarification. I was reading around on if I needed to drain the refrigerant first and found mixed results. Some claimed the high pressure switch has a schrader valve underneath it, but it may be for earlier/different platforms I guess. Have you heard of this?

2006 XC70 - My volvo mechanic suggested I change out the AC pressure switch near the compressor to fix some weird CELs issues I'm getting that are all shared by a common wire in the 5v system. Anyway, I was told the front bumper needs to be removed to get access. Either way, I've looked around and h...