Need help!

[99silvergtp]

ok so my 99 gtp keeps throwing the code p0172 which is fuel trim system rich bank 1. and i do not know what is making it run rich. can anyone help me please

 

[TorqueAutoMotiv]

dont know if this link will work for ya but it has the diag and breakdown of what causes that code
http://sm.gpona.com:9001/servlets/BlobShtml?ShtmlFile=193412&psdid=78&evc=sm

 

[BwolfGT]

Could be a bad maf or a vac leak. Both those are what caused mine.