Well, its developed a rough idle now and a code pops up while driving(first time that's happened). Codes are 322 and 311. Thoughts?

 

311 code is missing speed signal from the speedometer. Without this signal you may notice some driveability issues such as the engine stalling when coming to a stop. 322 is air mass meter wire burn-off signal faulty or missing.

Take a look at the engine codes from the 700/900 series FAQ: https://www.brickboard.com/FAQ/700-9...InjectionFault

I had the 311 code throw on my 240 and the problem was a bad chip in the speedometer. I replaced the chip and that solved my problem. Could also be a missing or broken wire coming out of the speedometer. I'm not familiar with the 900 series so I don't know what the color of the wire is. Perhaps others on the board can chime in.

 

Thanks. I tested the Air mass and it seems good. So, after much effort, its off to our local Volvo specialist. Hopefully he can figure it out.