NOTTHATKAREN

Lexus ES300, from 2002. Been rehabbing this girl last 2 years from purchase with long time Toyota mechanic, and we recently hit the wall. Always have had these codes and they get fixed for awhile, but always come back. PO 330 PO440 PO 441 PO446 Replaced sensors, some 2 times, new battery, resetting fuses, checks of electrical, new engine, new computer, various other changes and parts. My friendly little codes will not leave... Right after I pay, she runs so smooth and mileage gets to around 25 with combo driving. One time I made it to 240 miles before the next code and I thought we were in the clear. After the recent new computer, 13 miles and the same codes were triggered. Im not giving up! He might... My thoughts are perhaps IAVC / ISC is in need of cleaning, will find out about that from mechanic, or a vacuum leak he has somehow overlooked or did not test for. Gotta still pass AIMS in Ohio and its a hassle when spring comes for me! Thoughts anyone...? Thanks in advance...