MY LEXUS IS200 SE engine management light came on had it checked it was sensor 1 bank 2 had it replaced it came on again sensor 1 bank 1 had it replaced it came on again sensor 1 bank 2 HELP!!!!!!

It is located on the exhaust manifold and you will need a ratchet and a oxygen sensor socket in order to replace it.

P0172 LEXUS - System Too Rich Bank 1
Possible causes
Faulty front heated oxygen sensor
Ignition misfiring
Faulty fuel injectors
Exhaust gas leaks
Incorrect fuel pressure
Faulty Mass Air Flow (MAF) sensor
https://www.autocodes.com/p0172_lexus.html

Get yourself an On board display scanner from ebay about 20GBP.

read the instructions. Plug in to the under dash socket and note the fault code. Look up the code and then see if you can fix the problem. If you can't, clear the engine management light [the next time you start it the light will come on again] and take it to a garage Don't tell them what you know, see if they feed you with a lot of rubbish and try to rip ou off.

That is a Ford code P1150. Lack of HO2S bank 2, sensor 1 switches, fuel trim at limit..Toyota/ Lexus A/F sensor circuit range/ performance, malfunction [ bank 2, sensor 1 ] hope this is helpful..

Yes the O2 sensor preheater problem will turn on the VSC light, see the complaint often, why? don't know
.P0031 TOYOTA - Oxygen Sensor Heater Control Circuit Low Bank 1 Sensor 1
In most cases the O2 being replaced cures the code but here is the full story.
Possible causes- Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 circuit open shorted to ground
- Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 circuit poor electrical connection
- Faulty Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 circuit
- Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 circuit fuse
- Faulty Engine Control Module (ECM)

Ok as a guess that you have a SUV and you have different air faults. if you are a DYI'er go to an auto parts store and get an error code tool. Harbor freight for $30-50. Hook it to the car and find out which sensor is it calling for. Note, you can reset the check engine light on most tools that are not the cheapest.
P1130
Air/Fuel Ratio Sensor Circuit Range/Performance Malfunction (Bank 1 Sensor 1)

P1133
Air/Fuel Ratio Sensor Circuit Response Malfunction (Bank 1 Sensor 1)

P1135
Air/Fuel Ratio Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

P1150
Air/Fuel Ratio Sensor Circuit Range/Performance Malfunction (Bank 2 Sensor 1)

P1153
Air/Fuel Ratio Sensor Circuit Response Malfunction (Bank 2 Sensor 1)

P1155
Air/Fuel Ratio Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

Bank 2 reffers to exhaust manifold where the # 2 cylinder lies. Depending on how many sensors you have on that side you will find the sensors there. The sensor clossets to the engine would be sensor 1 bank 2 and if you have another on bank 2 it be reffered as sensor 2 bank 2. The same applies for bank 1 sensors the one cossets to the engine is rtefferred to sensor 1 bank 1 and sensor 2 bank 1. Hope this helps.

your o2 sensor is bad. vsc will go on for any small DTC displayed on the MIL (cel)

P0037 LEXUS P0037 LEXUS - Oxygen Sensor Heater Control Circuit Low Bank 1 Sensor 2 Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
Possible causes - Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit open shorted to ground
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit poor electrical connection
- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit fuse
- Faulty Engine Control Module (ECM) When is the code detected? The P0037 is set when the ECM detects an excessively low voltage through the heated oxygen sensor heater circuit P0037 LEXUS Description Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. The faster the heated oxygen sensor reaches that temperature the faster the sensor will start sending an accurate signal to the Engine Control Module (ECM).

In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECMcontrols the heater element circuit by allowing current flow to ground.

The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.

Bank 1 sensor 1 --- on left side of engine in exaust manifold .
Bank 1 sensor 2----- on exaust system near converter
Bank 2 sensor 1----- on right side of engine in exaust manifold
Bank 2 sensor 2 ----- on exaust manifold near converter

Bank 2 is on the passenger side. Bank 1 is the driver side. Sensor 1 is before catalytic converter. Sensor 2 is after catalytic converter. You can get Bosch part at Autozone for half of the OEM part price. I recommend to buy this first so you know that it looks like and how the connector is mated. There are two wrenches they sell for this job. The socket one works better but requires 1/2" drive. You need to jack the car up as high as you can and use a headlamp so you can see better. Loosen the screws (about 6) to remove the cover so you can see sensor 1 (sensor 2 is visible by looking at the exhaust system). Open the sensor first and then use a flat head screwdriver to pry open the mating connector while pulling the sensor down (side of sensor connector that has a ramp is the side you need to pry). Once old sensor is out, you can replace with new sensor. Remember to disconnect the ground cable on the battery and reconnect it to reset the check engine light before you start the engine. Good luck!