there are 4. here is one of them Bank 2 sensor 1
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there are 4 oxygen sensors one at the rear of each exhaust manifold and one behind each catalytic converter.
The 2001 Toyota Tundra front oxygen sensor torque specification is 20 pounds. The oxygen sensor bolts should be torqued in 10 pound intervals.
7/8
The P0155 refers to the Oxygen sensor on Bank 2, sensor 1. Bank 2 on your vehicle is on the passenger side of the engine. Sensor 1 is the first oxygen sensor in the exhaust pipe coming from the engine.
if it is a V8 bank 2 is on the right (passenger side). sensor 1 is before the catalytic converter (sensor 2 is after)
Tundra regions are typically found in the Arctic and Antarctic circles, in areas such as northern Canada, Scandinavia, northern Russia, Alaska, and parts of Antarctica.
The IAT sensor on a Tundra is on top of the air box. It is a small bolt on sensor with one wiring connector.
The O2 oxygen sensor on a 2000 Tundra is secured to the exhaust pipe. To change or remove it, you must lift the car on a hydraulic jack, and unscrew the nuts that hold it in place.
the oxygen is 10%
The tundra biome is typically found in high latitudes near the North and South Poles, as well as at high elevations in mountains. It is characterized by low temperatures, short growing seasons, and permafrost, which limits plant growth.
Tundra is abiotic because it cannot breathe oxygen.
2001 Tundra v8 code P0135 is a o2 sensor heater circut( Bank1 sensor 1).