Where is fuel trim bank 2 located on bmw 2000 740i bmw

P0300 is a random miss fire , a vacuum leak can cause this as well as low fuel pressure ! weak fuel pump , clogged fuel filter !
DTC P0171: Fuel Trim System Lean Bank 1
DTC P0174: Fuel Trim System Lean Bank 2 These two codes are saying the PCM - engine computer is see a lean condition .
DTC P0191: Fuel Rail Pressure (FRP) Sensor Performance
Circuit/System Description
The fuel pressure sensor is located on the fuel line. The fuel pressure sensor monitors the fuel pressure in the fuel line. The fuel pump flow control module (FPCM) monitors the voltage signal from the fuel pressure sensor.

You don't say what make , model an year vehicle ! These are for GM vehicles , yours could mean something else . Except the first three , those are genaric codes , same for all makes ! So can't say what this codes are P2097, and P2099 ! Can't mean this P2097 - Post Catalyst Fuel Trim System Too Rich Bank 1
P2099 - Post Catalyst Fuel Trim System Too Rich Bank 2

P1174 - Fuel trim adaptive malfunction (Bank 1)
P1175 - Fuel trim adaptive malfunction (Bank 2)

bank 2 sensor 1 is a heated oxygen sensor in the manifold or exhaust before the cat converter
it is not an o2 sensor which is oxygen sensor after the cat converter for bank 2
two completely different sensors
the fuel trim code appears because of the problem sensors
the fuel trim is cpu program in the computer in the ECM setting a optimum fuel /air ratio after a period of driving
if the sensors both HO2s and O2 sensors are faulty then the cpu cannot set the fuel trim

BMW Unmetered Air Leaks P0170 P0173 Mixture Too Lean ...

? 6:41
www.youtube.com/watch?v=Eso0dgmymhYJan 2, 2013 - Uploaded by AskTheCarExperts BMW Unmetered Air Leaks P0170 P0173 Mixture Too Lean Smoke ... a lot thank you , damn boot was giving me so much problems and codes.

P0173 Fuel Trim Malfunction (Bank 2) - OBD Codes

www.obd-codes.com/p0173
Detailed information on troubleshooting and repairing a P0173 DTC code which refers to a fuel trim malfunction on Bank 2. Also includes links to relevant forum ...

You have a small air leak. The fuel trim kept increasing to compensate until it exceeded the allowable range. Change the valve cove gasket and valve cove bolt gaskets. check for leeks around intake manifold.

If it's only on bank1, you may have poor flow from the injectors. If you get the code for bank 2 show even as "p/d" then a possible vacuum leak. Unmetered air is telling the pre-cat O2 sensor a lean condition. The computer will add more fuel, up to 20% and then it throws the code. Suggest you do a fuel injector cleaner in-tank next fillup. If code persists have the smoke test done to check for vacuum leak. Q: How's is your idle?

P0304 = #4 cylinder misfires
P0170 = Fuel Trim, Bank-1
P0173 = Fuel Trim, Bank-2
P1250 = this is invalid code for BMW
P1188 = Fuel control, bank-1, sensor-1 (pre-cat sensor)
P1189 = Fuel control, bank-2, sensor-1 (pre-cat sensor)
Vacuum leaks and/or sensor defective for the issues of the codes.
This error codes really need parts to replace. But you have to replace the thermostat first. Then clear the codes and see if any reappears,then replace defective part/s

Explanation:

According to my research and the BMW master mechanic, basically your oxygen sensor is getting an abnormal reading. The abnormal reading will result in the sensor being unable to adapt beyond its +/- 10% threshold to adapt for the fuel/trim mixture. Therefore, either your car is going to run too lean (not enough fuel) or too rich (too much fuel).

Problems:

1) Either your pre-cats oxygen sensors are bad.
2) Fuel pressure regulator
3) Leak in the air intake /vacuum system
I would think that it is probably your oxygen sensors. Replace that and you should be good to go. Thanks for rating my response and for using FixYa!

Hello There

These are very common codes on BMW's which can also be false codes, try clearing the codes and run the test again they may not come up again.
With regards to the sound which you thought was a vacum leak there a breather pipe which runs under the plastic engine cover near the injectors which always gets a tear init which will need replacing.

Hope this helps, please don't forget to rate me.