Throwing P0174 code.... HELP!

[HopskinsS4]

So my car has a super rough idle and when you go to get on it in will barely run. It's throwing a P0174 code. The only thing I've found is my intake flap actuator on the front of the manifold was frozen and will not move. Could that be my problem as to why it is running lean?

[VinnysS4]

i doubt it. That flap changes above 5k RPM's. p0174 is bank 2 system too lean. Lean = Leak usually. It could be anywhere from an intake leak down to an exhaust leak before the 02 sensor. Basically your 02 sensor is reporting a problem in the system. That problem is the Air to Fuel Ratio is off and your exhaust gas contains too much air. If you have vag com, take a torch with a propane canister attached and open the nozzle a little and probe the UNLIT torch end around the motor and monitor the Short Term Fuel Trims. If they go rich, you have found your leak. You will basically need to probe around until you find the issue. It could be a vacuum line that only affects bank 2. Your MAF sensor could possibly be dirty and letting more air through it then the computer sees...however this should affect both banks equally. Was the p0174 code the only code thrown?

[HopskinsS4]

Yeah that's the only code, it started out with it acting kind of sluggish at higher rpm little rough idle, the next day it has rough idle and won't go above 30 mph and wants to act like it's getting no fuel

[Dolphin_S4]

Is there any follow up on this? I'm having somewhat the same issue.
Only running rough at idle. No issues whatsoever with power. P0174 code thrown only. When sitting in park I can feel the car start to miss or rough idle but if I tap the gas to raise the RPMs just slightly it corrects itself for awhile but eventually it will fall back into what feels like a cam lope. Any information whatsoever is appreciated, thank you!

[MrVern306]

Im having the same issue. Did you found out your problem?

[Herr G]

https://www.obd-codes.com/p0174

This will give you a few options. Both MAF and O2-sensors stick out, hope you will figure it out.