Which O2 sensors are upstream?
Sensor 1 is the upstream oxygen sensor. It is the sensor that measures the oxygen content in the exhaust, providing an input to the computer, which determines how to adjust the air/fuel ratio. Sensor 1 is the sensor closest to the engine.
What are the part numbers for the oxygen sensor?
Later model (2006+) refer to the downstream sensors as Air Fuel sensors. To complicate things more, Toyota calls for 4 different part numbers for each of the four sensors. Interestingly Denso only shows 2 part numbers, with no difference for left or right.
Where are the O2 sensors on a Land Cruiser?
The Land Cruiser 100 Series and LX 470 have 4 exhaust sensors, commonly referred to as “O2” sensors. Two of the sensors are “upstream” of the catalytic converters mounted into the exhaust manifolds. The other two are “downstream”, just past the bulge in the catalytic converters themselves.
How does a wideband O2 sensor work?
Wideband/Air-Fuel sensors perform the same function as a regular O2 sensor, but they precisely measure the amount oxygen in the exhaust rather than just switching between rich (too much fuel, not enough oxygen) and lean (too much oxygen, not enough fuel).
How big is an OE SmartLink oxygen sensor?
Premium Universal Oxygen Sensors with OE SmartLink are quick and easy to install. Each sensor has two-feet length of sensor wire to allow maximum replacement of worn harnesses.
Which is the oxygen sensor upstream or downstream?
Sensor 1 is the upstream oxygen sensor. It is the sensor that measures the oxygen content in the exhaust, providing an input to the computer, which determines how to adjust the air/fuel ratio. Sensor 1 is the sensor closest to the engine. Sensor 2 is the downstream oxygen sensor.
The Land Cruiser 100 Series and LX 470 have 4 exhaust sensors, commonly referred to as “O2” sensors. Two of the sensors are “upstream” of the catalytic converters mounted into the exhaust manifolds. The other two are “downstream”, just past the bulge in the catalytic converters themselves.
Later model (2006+) refer to the downstream sensors as Air Fuel sensors. To complicate things more, Toyota calls for 4 different part numbers for each of the four sensors. Interestingly Denso only shows 2 part numbers, with no difference for left or right.
What does the O2 sensor do in the PCM?
What does the O2 sensor do? Well, in a nutshell, the job of the upstream oxygen sensor is to report back to the PCM (Powertrain Control Module = fuel injection Computer) whether it’s injecting too much fuel or not enough. Too much fuel means that the air fuel mixture is Rich and if not enough fuel is being injected, this means it’s Lean.