Hello,

I had a MAF code in my car which went away after I cleaned the EGR out according to instructions here:

http://www.volvospeed.com/Repair/egr.htm

I did not actually take off the EGR itself just took off the throttle body and the problem was a clogged hole at the bottom that leads to the EGR. Maybe when you cleaned the throttle you pushed some stuff down there?

Also to check codes and re-set the engine check light follow the instructions here, very easy with no tools needed! THe box they show is near the passenger side winsheild wiper fluid reservior.

http://www.volvospeed.com/CheckEngine.htm