2002 Isuzu Trooper keeps stalling while idling?

More than likely,your engine has leaking intake plenum gaskets.If you spray the base of the intake with carb cleaner while it is running you should notice a difference in the way it runs if you have a vacuum leak.I have replaced dozens of these gaskets.And the codes that you listed are usually the ones that you will find with bad gaskets. The gaskets are not too difficult to replace, if you have done a few and you have all the proper tools.Wouldnt recommend doing it yourself.