Hey Scotty! My 2004 Lexus had the check engine light on. Also the VSC and TRAC OFF symbols were on. I took it to Autozone and checked the codes (for free). It was P0174 (fuel system to lean). I remember from your videos to check for vacuum leaks first. And sure enough two of the vacuum lines going to the air filter assembly were disconnected. Had to replace the air filter assembly (top half) since where the vacuum lines attached to it were busted. I found a used air filter assembly from a Camry at a junkyard for 9 dollars. Replaced assembly and reconnected all vacuum lines. All codes instantly disappeared!! Back on the road and smooth as ever.
I think someone attempted this repair before I bought the vehicle as there was epoxy where the vacuum line attached to the assembly. Now it is fixed the right way and it should hold up. If the codes come back, I will let you know.
Congratulations! That's a powerful moment, isn't it?
Thanks for sharing and glad it is resolved.
Sure was, and I want Scotty to know he played a big part. Not every check engine code is going to get fixed this easily. But when you can fix it yourself and it only costed 9$, that is a Scotty moment for sure. I will post a pic soon of the old assembly box so people can reference (if I can figure out how to post a pic here).
Ok here is a link to the old air filter assembly that I replaced.
https://imgur.com/gallery/vv6WhZL
You can see where the epoxy job was attempted.
Also the date on the assembly is 2019. So I am now certain (given that it is a 2004) that someone attempted a repair before, but did a terrible job at it.
One more thing. There are four screw in style large C clamps that hold the hose onto the assembly post filter and before the intake. I found that the other three clamps that I didn't need to remove were a tad loose, so I tightened them up a bit. This is a smart thing to check for when dealing with a vacuum leak issue. I am certain that I learned that from one of Scotty's videos. Do you recall a recent video were Scotty fixed a rough engine by tightening up the battery terminal?