Plz Help me identify this unattached hose next to the Oil Stick and Disa Valve

[shevin]

Originally Posted by X5chemist

What did the spark plugs look like? What brand are installed? Unplug the MAF sensor. How does it run? What is live data for MAF, O2 voltages for front and rear readings?

@X5chemist UPDATE !!!!

I unplugged the MAF sensor and drove it and the Rough idle gone !!! and also I no longer get the System too lean Codes anymore !!!

does that mean everything else is Good and I only need to fix the MAF sensor ?

I also opened the MAF sensor to clean with the CRC spray and I noticed parts of it is Orange, is that normal color or is that rust?

https://imgur.com/a/89QY7ml