Hyundai sonata o2 heater cicuit bank 1 sensor 2

Bank 1 is the bank of cylinders on the firewall side
Bank 2 is the bank of cylinders on the radiator side
Sensor 1 is the O2 sensor before the cat
Sensor 2 is the O2 sensor after the cat

Usually these are located on the exhaust manifold or just below the exhaust manifold and you should be able to see it in the engine bay. On V6 engines there will be one sensor on each of the 2 exhaust banks.
You will probably need to remove the engine cover to see the sensors on your exhaust.

If someone told you to replace these because you got a particular fault code I would be wary. A decent scan tool and basic diagnostics can show if the 02 sensor is working or not. Some faults often blamed on an 02 sensor are not due to faulty sensors.

Definition of Diagnostic Trouble Code P0166 Category: Powertrain Definition: O2 Sensor Circuit No Activity Detected Bank 2 Sensor 3Note: This definition of P0166 is applied to all manufacturers
Definition of Diagnostic Trouble Code P0167 Category: Powertrain Definition: O2 Sensor Heater Circuit Bank 2 Sensor 3Note: This definition of P0167 is applied to all manufacturers

The code means the O2 sensor is not heating up fast enough. It has nothing to do with the heater inside the car.
The sensor and the circuit would need to be tested to find out what the problem is. The code does not mean something needs to be replaced. Only tested.

Bank 1 is located towards the driver's side. Sensor 1 is located upstream just below the exhaust manifold.
EOBD II Error Code: P0134
Description:
Oxygen Sensor (O2S) 1, Bank 1/Heated Oxygen Sensor (HO2S) 1, Bank 1 - No Activity Detected
Possible Causes:
- Wiring.
- Signal wire between the Heated Oxygen sensor and ECM is disconnected.
- Heated Oxygen Sensor defective.
- ECM.

Most times when you get this diagnosis the best way to resolve it is to replace the o2 sensor, because it is faulty. Many of your newer cars have more than one so knowing which one is helpful.... anytime you see bank 1 it means in front of the catalytic converter, if you see bank 2 then it means it is behind the catalytic converter, basically bank 1 sensor 1 is going to be closest to the header/manifold. bank 2 sensor 2 will be back towards the muffler/tailpipe

P0433....Heated Catalyst Efficiency Below Threshold (Bank 2)

P0161....O2 Sensor Heater Circuit (Bank 2 Sensor 2)

you have a problem with the O2 sensor but as for it not starting then iam not sure as i cannot see this from stopping the engine from starting ,check the crank sensor with a automotive multimeter to see if its producing a voltage

The bank has to do with which side of the engine. The 'Sensor 1' indicates that it is upstream of the catalytic converter.

Heated Oxygen Sensor Removal & Installation Heated Oxygen Sensor (Front) (2.4L)

Heated Oxygen Sensor (Rear) (2.4L)

Heated Oxygen Sensor (Bank 1/Sensor 1) (3.3L)

Heated Oxygen Sensor (Bank 1/Sensor 2) (3.3L)

Heated Oxygen Sensor (Bank 2/Sensor 1) (3.3L)

Heated Oxygen Sensor (Bank 2/Sensor 2) (3.3L)

From what I can find in my book - they are (generic code)
P 0700 Transmission Control System Malfunction
P 0133 O2 Sensor Circuit Slow Response (Bank 1 Sensor 1)
P 0137 O2 Sensor Cicuit Low Voltage (Bank 1 Sensor 2)
P 0131 O2 Sensor Circuit Low Voltage (Bank 1 Sensor)
P 0171 System Too Lean (Bank 1)
Could not find these codes in the GM section - that is why I went with the Generic codes

there is two wires then suposed to be same color they are not what you looking for but if you have a grey and a black wires it willl be one of those i hope and this help