Hello Scotty, I hope you are well and happy 🙂   In absolutely love your channel!!!

So, I have a first gen 2004 Nissan Titan 4X4 Off Road/Big Tow package, Auto trans, with about 204k miles on it; no codes. It has been maintained meticulously all of it's life. It still looks great, drives great and runs like a new pickup. I've done a a few upgrades to it for my own enjoyment, to include a complete stainless dual exhaust system with long tube headers, metallic hi-flow cats, and large diameter dual cat-back set. K&N Big Tube air intake with 10inch conical filter, and and set of 4.56:1 gears. It may be helpful to know of these things when thinking of the issue I will describe. Although it doesn't seem as though any of these upgrades actually caused the issue, as it was present before the upgrades. So I'll get to it. Much like the common issue that other titan owners complain about, the default idle rpm at operating temp, drops below 500rpm when the transmission is in any gear. As a result, the oil pressure drops below 20psi and activates the oil pressure warning, while the engine chuggs to keep running. If the heat or AC is on, the ECU compensates for the load, but with nothing on, there doesn't seem to be an idle air compensation protocol for this; silly Nissan.

So based on this info, my question is this: do you know of a way to access the engine idle target rpm adjustment on the 2004 Titan? I have been scouring the internet for a solution and nobody seems to have a clue.