Codes on my 2005 XC 70
 

My 2005 XC 70 started running poorly - intermittent rough idle, lack of power. It starts ok, runs, but not good. Ran the codes at the auto parts store, they are:
- Engine Control Module (929D)
- Ignition Coil Cylinder 5 Signal (354B)
- Throttle Valve (9270)
- Mass or Volume Air Flow A circuit range/performance (P0101)
- System too rich off idle bank (P2178)

With so many messages, anyone have any thoughts on the most likely culprit/where to start. So far, have cleaned the MAF, seemed to make some improvement.
Pat Geraghty

you may also want to clean the throttle body and read up on ETM issues and symptoms.