Question about 2004 Toyota Sienna
How to replace o2 sensor bank2 sensor1
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Posted on Jan 02, 2017
Oxygen Sensor Connector locations
Oxygen Sensor testing
I really hope helped with this. Remember rated this help, good luck.
Posted on Nov 30, 2009
SOURCE: E-Check Light P0125 and
Air/Fuel Sensors are mounted upstream of the catalytic converter. They are located on the exhaust manifold side of the catalytic converter (pre-converter - Sensors 1). Oxygen Sensors are mounted downstream of the catalytic converter (post-converter - Sensors 2). The catalytic converter has two chambers (left and right). Bank1 is left, drivers side. Bank2 is right, passengers side. The Bank2 Sensor1 sensor (Air/Fuel Sensor) is the one located on the 'right and ahead' of the converter. The PowerTrain Control Module (PCM) is reporting that the heater or circuit ( wiring / plug-in) of the sensor is malfunctioning.
Posted on Jan 31, 2011
SOURCE: HI I have toyota avensis verso
Air/Fuel Sensor Heater Circuit. (Bank 1 Sensor 2)
The A/F sensors are positioned high in the manifold before the cat and are used to make adjustments to the air/fuel ratio of the fuel injection system. The heated oxygen sensors are positioned after the cat and check the efficiency of the cat (what happened in there as a result of the A/F sensors above). They too can signal changes to the air/fuel ratio. These latter sensors only work when they are hot and need to be electrically heated quickly to give decent information quickly. They work by comparing the oxygen inside the exhaust with the oxygen on the outside.
You could say that the ones before the cat make large adjustments and the ones after make smaller refinements.
It is worth remembering that a fault code could have been stored because at some stage the sensor went outside of its range and for this reason it is always worth cancelling any stored codes as this sometimes puts the light out. There are also several other reasons why a sensor could be showing a fault (it is correctly saying that something else is causing incorrect air/fuel ratio) such as leaky EGR valves or vacuum pipes so just have a look around to see if there is anything obvious.
The DTC code will normally indicate the exact sensor that is faulty or at least showing out of range and not the group of sensors. In this case as you stand looking at the engine from in front of the car it is the top one on the drivers side.
Keep in mind they are sensitive devices (read that as fickle) and although you should start there you can often end up changing more than one and some cases even the cat before you can get them to settle down.
Posted on Mar 07, 2011
No the wires won't likely be the same length
The front upstream sensors, are not the same
Part # as the rear,downstream monitor sensors
Go to Rock Auto.Com & look up your oxygen sensors
I would get the NTK or Bosch,if they have that
You do not replace the rear sensors, until they fail
You replace the front ones at 100,000 miles or sooner,
if they fail
Posted on Jun 03, 2012
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