Volvo Repair: check engine light, mass air flow sensor, mass air flow

Question
I have a 2000 s80 with 45000 miles on it.
check engine light came on. reset it with the code resder . it read on the code reader map large leak. when i reset it , it was off for a few days and then it happend ag also the sun roof stopped working at the same time, after re setting code it started working after about 30 min.              thanks gus

Answer
The problem is most likely a mass air flow sensor.  Unfortunantly the generic code readers and such just don't get enough information out of the car to verify that for sure.  You may have to take it to the dealer to confirm this diagnosis, because it could also be 1 of 4 oxygen sensor that have failed.  Either could cause fuel trim codes like that.  The sunroof stopped working because of a failing siren module.  That is the only thing that disables it.  They could also verify that at the dealer at the same time.

James