Volvo Repair: 2000 Volvo S70, mass air flow sensor, mass air flow

Question
I am having a problem with my car's idle.  It keeps searching for an idle.  Sometimes it will either completely stall out or surge forward.  At first the computer came in with a mass air flow sensor fault, so I replaced that.  After about a month it started to do it again.  I called Volvo and the told me to clean the throttle body.  Well it is as clean as a whistle.  Now it is coming back with a code of ECM262A, and we have no idea what that is.  Can you by any chance help me out?

Answer
the codes is a reference to air fuel mixture.most common problems for this code are a bad air mass meter or bad throttle body just because it is clean does not mean it is still working properly.it would need to be checked with a scan tool to check the sensor readings.