The sensor is left bank 1/1 is ft and 1/2 is the rear
NEW ANSWER: Bank 1 is the drivers side of the engine. Sensor 2 will be the second sensor in the exhaust pipe on that side of the engine. Start were the exhaust pipe bolts to the engine and work your way down the pipe until you see the second sensor and that will be the 1 you need.
Same bank as cylinder # 1 and rearmost sensor behind converter (downstream)
Heated Oxygen Sensor (HO2S) Circuit Low Voltage Bank 1, Sencor 2
Sounds like a clooged filter or a weak fuel pump. Replace the Fuel Filter. Install a fuel pressure gauge on the fuel rail and check it under load. If the pressure drops even a little the fuel pump is bad.
PO137 (Sensor Circuit low voltage Bank 1 Sensor 2) This is the O2 sensor behind the Catalytic Converter on the driver's side. Check the wiring on that sensor before proceeding. More than likely replacing that sensor will solve the problem especially if you have over 75,000 miles on the vehicle. But there is no guarantee that will fix it.
Bank 1 is the bank of the engine that contains #1 cylinder. Bank 2 is the other bank. Sensor 1 is located before the catalytic converter. Sensor 2 is located after the cat converter.
I have a code DTC P0154.Bank 2 Sensor 1 no activity.Which sensor is this on my 96 Blazer?
Disconnect one of the 02 sensors and read the newly generated code. Then reconnect it and erase the code. Read codes again the new Bad 02 sensor code should disappear. Hence the code that followed your procedure will be for bank 1 or 2. You know which sensor you just disconnected and the new code has then identified what bank it resides in so then you will know which bank is which. You can bet real money on that.
Bank 1 driver side sensor 2 rear sensor. Good luck
left side of the engine after the cat
That code indicates a fault in the 'downstream heated O2 sensor' , bank 2.That code indicates a fault in the 'downstream heated O2 sensor' , bank 2.
P0155 = O2 sensor heater circuit malfunction (Bank 2 Sensor 1). All O2 sensors are threaded into the exhaust system at various points. Bank 2 would be the bank of cylinders that does not contain the #1 cylinder. Bank 2 Sensor 1 would be the first O2 sensor leading from bank 2 of the engine.
Camshaft Position Sensor A - Bank 1 Circuit Malfunction Trouble code P0340 means: Camshaft Position Sensor A Circuit (Bank 1 or single sensor)