Appreciate including the Swedespeed link, lots of good information in there (29 pages worth with additional reference links). For my own edification I went looking in VIDA 2014D for AOC and DEM (Design and Function, 465 final drive, front and rear). I see the pump (on or off with no variability) and...

Give this a try, its the same for the T4.

Instrument panel (DIM) might be a cold solder joint on one of the chips, some areas go wonky (clock as another example) and the issue progressively gets worse until the entire DIM goes blank (experienced this on a '03 S80). That your information windows is not working may be a symptom of a pending f...

For testing fuel/air ratios, it's easy enough to see the performance in VIDA (software that interfaces with the vehicle via a DICE unit) if you have access. Might be some other readers that can pull metrics as well, VIDA is all I know. If I were to "guess" at the rear O2 sensor problem, I ...

I don't believe that you can. The rack bolts to the subframe and the hoses have a rigid part that runs along the rack on the back side which means between the front subframe member and the side of the motor is all the in place space you have to work. See visual for a 5 cylinder, not sure what motor ...

I believe that the only way to replace those hoses is to drop the subframe to some degree. I don't see how you'll be able to do it otherwise.

https://parts.volvocarslisle.com/a/Volv ... 8247422E9D

All good, most dealer internet resellers (including the one I noted above) use the same base catalog and it's pretty detailed. Can find it here https://usparts.volvocars.com/ . Tasca Parts (also dealer reseller) in Rhode Island has a slightly different parts catalog layout and sometimes they have a ...

Values match P1 and P2, think offset is reasonable. I might check the integrity of your electrical connections given the jumpiness of the sensor 1 output with the brake pedal untouched. If you do end up replacing one brake booster pressure switch, replace them both. I get this message sporadically. ...

Turning and the antiskid appearing/disappearing could well be the steering angle sensor (SAS), a code read from a diagnostic tool may confirm. TMPS has no sensor in the spare, really dumb system that's capable of using a ton of aftermarket sensors. System description is noted here- https://www.swede...