Steve is right, its running lean. if after cleaning the MAF, replacing the PVC and cleaning the Throttle body and plugs, if the code comes back, you will need to get a new MAF. there only about $80 and you can install that yourself.
http://www.4x4wire.com/toyota/maintenance/...ntenancep5.html
ALSO, at about 100K miles you will want to change the O2 sensors.