Bank one sensor 1 is the bank of cylinders that number 1 spark plug is located in, bank 2 the other side, this assumes u have a V8, the sensor one location is the sensors that are BEFORE THE CATALYTIC CONVERTER, the sensors referred to as sensor 2 are after the ones AFTER THE CATALYTIC CONVERTER IN THE EXHAUST SYSTEM.
2008 toytoa highlander obo reader code p0031 heater control sensor low bank 1 senor 1 where is it its a v6
SOURCE: Replacing bank 1 sensor 2 and bank 2 sensor 1 oxygen sensors
BANK ONE IS THE REAR BANK OF CYLINDERS AND TWO THE FRONT BANK
SOURCE: where is the bank 2 sensor 1 located.
Oxygen sensors are always numbered like this:
Bank 1 sensor 1
Bank 2 sensor 1
Bank 1 sensor 2
Bank 2 sensor 2
some manufacturers use a kind of shorthand that reads different, but means the same thing:
Sensor 1/1 or O2s 1/1
Sensor 2/1 or O2s 2/1
Sensor 1/2 or O2s 1/2
Sensor 2/2 or O2s 2/2
Bank 1 is always the side of the engine where cylinder number 1 is located and, of coarse, Bank 2 is the opposite side.
On a 4 cylinder engine, there is only 1 bank and it is always referred to as Bank 1.
Sensor 1 is always the upstream sensor (The one located BEFORE the catalytic converter)
Sensor 2 is always the downstream sensor (the one that is located AFTER the catalytic converter.
Most GM engines have #1 cylinder located on the left bank, (or Driver's Side) of the engine,
So, the answer to your question would be that you are looking for the sensor located before the catalytic converter on the right (or Passenger Side) of the truck.
SOURCE: location of the bank 1 sensor 2 O2 sensor on a 2001 ford escape
B1 means the sensor is located on the same bank of the engine that has the #1 cylinder. B2 is located on the opposite bank.
S1 means the sensor is located BEFORE the catalytic converter
S2 means the sensor is located AFTER the catalytic converter
You didn't say which engine you have, so I've included the diagrams of both 4 cyl and 6 cyl so you can see the banks
SOURCE: I have a O2 sensor out. It is bank 2 , sensor 1.
sensor one , bank 2 ( bank 2 is where cylinder number 2 located, in this case it's in the front ) is in the front of the vehicle and mount before the catalytic converter, most likely on the exhaust manifold. the one after the cat ( or down stream is the sensor 2 )
Testimonial: "Thanks!!! Great service and great info."
SOURCE: PO137, PO 138 codes
well on my car these are reffering to the sensors in the exhaust, the upstream sensor(before the cat) and the downstream sensor(after the cat) the downstream sensor can act up if it is lazy or sluggish, or due to a bad catalytic converter or a clogged one. however there are sensors on the exhaust manifold which are determined by driver side or passenger,my opinion is to get a scanner for about $100 to $150 and you can figure out many of these codes yourself.
P0050 HO2S Heated Oxygen Sensor -Control Circuit (Bank 2 Sensor 1)
P0051 HO2S Heated Oxygen Sensor -Control Circuit Low (Bank 2 Sensor 1)
P0052 HO2S Heated Oxygen Sensor -Control Circuit High (Bank 2 Sensor 1)
P0053 HO2S Heated Oxygen Sensor -Resistance (Bank 1 Sensor 1)
P0054 HO2S Heated Oxygen Sensor -Resistance (Bank 1 Sensor 2)
P0055 HO2S Heated Oxygen Sensor -Resistance (Bank 1 Sensor 3)
P0056 HO2S Heated Oxygen Sensor -Control Circuit (Bank 2 Sensor 2)
P0057 HO2S Heated Oxygen Sensor -Control Circuit Low (Bank 2 Sensor 2)
P0058 HO2S Heated Oxygen Sensor -Control Circuit High (Bank 2 Sensor 2)
P0059 HO2S Heated Oxygen Sensor -Resistance (Bank 2 Sensor 1)
P0060 HO2S Heated Oxygen Sensor -Resistance (Bank 2 Sensor 2)
P0061 HO2S Heated Oxygen Sensor -Resistance (Bank 2 Sensor 3)
P0062 HO2S Heated Oxygen Sensor -Control Circuit (Bank 2 Sensor 3)
P0063 HO2S Heated Oxygen Sensor -Control Circuit Low (Bank 2 Sensor 3)
P0064 HO2S Heated Oxygen Sensor -Control Circuit High (Bank 2 Sensor 3)
P0065 Air Assisted Injector -Range/Performance
P0066 Air Assisted Injector -Circuit Malfunction or Circuit Low
P0067 Air Assisted Injector -Circuit High
P0068 (MAP) Manifold Absolute Pressure /(MAF) Mass Air Flow - Throttle Position
Correlation
P0069 (MAP) Manifold Absolute Pressure / (BARO)Barometric Pressure Correlation
P0070 Ambient/Outside Air Temperature Sensor -Circuit Malfunction
P0071 Ambient/Outside Air Temperature Sensor -Range/Performance Problem
P0072 Ambient/Outside Air Temperature Sensor -Circuit Low Input
P0073 Ambient/Outside Air Temperature Sensor -Circuit High Input
P0074 Ambient/Outside Air Temperature Sensor -Circuit Intermittent
P0075 Intake Valve Control Solenoid Circuit Malfunction (Bank 1)
P0076 Intake Valve Control Solenoid Circuit Low (Bank 1)
P0077 Intake Valve Control Solenoid Circuit High (Bank 1)
P0078 Exhaust Valve Control Solenoid Circuit Malfunction (Bank 1)
P0079 Exhaust Valve Control Solenoid Circuit Low (Bank 1)
P0080 Exhaust Valve Control Solenoid Circuit High (Bank 1)
P0081 Intake valve Control Solenoid Circuit Malfunction (Bank 2)
P0082 Intake Valve Control Solenoid Circuit Low (Bank 2)
P0083 Intake Valve Control Solenoid Circuit High (Bank 2)
P0084 Exhaust Valve Control Solenoid Circuit Malfunction (Bank 2)
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How do I replace bank 1 sensor 2 on a 1997 Cadillac
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