Read code P 0141 Install new sensor still reading code P 0141 Check voltage for sensor heater it is 12Vdc.

P0141 OBD-II Trouble Code: O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)

Ask once and wait.

Did you check to see that the sensor heater circuit was providing proper voltage to the sensor when the engine is first started? Did you check for proper resistance in the heater of the sensor before replacing? Did you replace the correct sensor? Did you just have the code read and purchase a new sensor without confirming that the sensor was bad?

all of those codes listed have a common fault listed and that is the ECM
substitute it with a known good unit and then see what happens

Check voltage on battery. Measure voltage across pos and neg terminals. Should read about 13-15 vdc when charging. should read 12vdc when car is off. anything lower than 12vdc means battery has a short inside of it and needs replaced.

If alternator is working and wired correctly, and charging the battery see how long battery holds a charge. turn on the headlights and see if they go dim after awhile . If so, replace battery.

Could also be a problem somewhere behind the dashboard.

it sounds like a faulty oxygen/o2 sensor

that is a 12vdc power problem.
the sensors are failing , many do to lost power. (12vdc electrical distribution power)
so use a voltemeter, i bet even at he cig lighter port the voltage drops
below 13.3v running, way below. infact.
are your battery terminals clean,
is the rested voltage at the battery terms 12.6v (keys in pocket)
no? then the battery is being discharged,

I'm sorry you spent that money if this was the original code.

The code means one of the O2 sensors has a faulty heater or the power circuit for the heater is bad. The sensor is not heating up as fast as it should. Since you have replaced the sensor you would need to check the power circuit for the heater.

P0037 SUBARU 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 ECM controls 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.
Read more: http://engine-codes.com/p0037_subaru.html#ixzz26TjIZyLw

code P0455......... Evaporative emission system leak detected ( large leak ) check gas cap

code 1451...........secondary air system leak ( bank 2 ) check for vacuum leak

code 1423...........secondary air system leak ( bank 1 ) check for vacuum leak

code 0141...........02 sensor heater circuit ( bank 1, sensor 2 ) replace 02 sensor

P0108 - Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage,
Possiable MAP sensor defective

P0134 - Heated Oxygen Sensor (HO2S) Circuit Insufficient Activity Bank 1 Sensor 1
P0141 - Heated Oxygen Sensor (HO2S) Heater Performance Bank 1 Sensor 2 , I recommend you replace both O2 sensors, bank 1 and bank 2