Hi Guys, You diagnosed and repaired my Lexus ES300 (1999). The diagnosis included three things: Lean Condition, Misfire on 3 cylinders, and knock sensor issues. The recommendation was to replace the the MAF sensor and replace the OCV. I agreed with the OCV replacement and did not agree with the MAF replacement. We also discussed that I think the wiring harness for the knock sensors has gone bad. I was very impressed that the technician listened to my thoughts and the history of the car and we agreed to simply replace the OCV (One was replaced a couple of years ago) and see how it goes. The car is running much better. It still has a CEL and Trac Off, but I think that the issue is the knock sensors. I can live with that as it has been an issue for a couple of years and it is very expensive to replace. The most aggravating part of the CEL is that it often causes the car to stay in direct instead of shifting to overdrive. I can often pull over, shut the car down, rest