I just recently had the exact same scenario on my 2005 XC90 V8. Did you ever determine the cause of the problem?? I'm assuming it is something electrical to have both warnings come on simultaneously. Thanks for any help!
Mike

I'm looking to change out my FRPS this weekend too on a 2005 v8 but it looks like you have to remove the inlet manifold to get access. the1stkim, did you remove the sensor with the inlet plenum in place? basically, how the heck did you get the darn thing out??? Any help from anyone would be great. I...