It pulls strongly through the range after a momentary lag.

My '05 XC70 gas mileage suddenly dropped from 18-28 to 12-20. Got one-time codes about MAS and some other fuel system related issues. I canceled them, thinking they'd come back and now I can't remember them. I've done a forum search and not found a definitive process for problem solving. Can someone...

XC70, '05, teaching me a lot, so I can help.

I have an '05 XC70 which I bought with 111K on it. The climate control was wonky in that the driver's side temp control wouldn't vary the temp. All cold until knob set to highest (red) setting. I've replaced and tested 4 other modules from a junk yard. Various results but none a full functioning mod...