Where is o2 Sensor; Bank 1 Sensor 2 on a 98 Plymouth Voyager sideways 6cyl.?When we open the hood...there is an o2 sensor on the car we can see...is that it or is there one further back (downstream)? OBII says it's bad...should I replace it $100 or could it be something else? Do I need to reflash the ECU after- any advice is appreciated. | |
Under the car, behind the catalytic converter, you should clear the code after replacing it using a scan tool.
Note to tkfaw, your info is incorrect about o2 sensor positions. Bank 1 refers to which head its monitoring, Bank 2 on a v6 would be the front head on a chrysler minivan, with cylinders 2-4-6. Sensor 1 refers to engine monitoring, upstream from catalytic converter, sensor 2 refers to catalyst monitoring, downstream of catalytic converter. So bank 1 sensor 2 would mean that it is a catalyst monitoting sensor, downstream from the converter.
Bank 1 refers to the the Bank that the # 1 cylinder is located. Sensor 2 is the down stream sensor after the CAT (catalitic converter). Why its saying that its bad can be alot of factors - O2 sensors do go bad one at a time or even in pairs.
My suggestion to you is this - reset the Check Engine Light, using a scanner - drive the vehicle for a few weeks IF the light comes back on re-check it - if its the same code for the BAnk 1 Sensor 2 then i would replace BOTH down stream sensors if it has 2 if not then just that one in question.
There are alot of variables that will make that light come on. Some are easy and are visable some are a cluster of things happening and the computer triggers the light on the one thatis most effected by the fault.
Always always - refer to a reputable repair facility. I have even gone to the dealer let them diagnose my vehicle and then repaired it myself - at least you know that they looked at it and figured where the problem lies.
Good Luck
bank 1 refers to the sensors in front of the catalitic converter, bank 2 is behind it. sensor one is the drivers side on most vehicles (cept fords) and sensor 2 is the passenger side. on a front wheel drive vehicle, as is yours sensor 1 should be in the front and very easy to see, sensor 2 should be fairly easy to get to from underneath. once the sensor has been replaced, just clear the codes with a scan tool, or unhook the battery for a few minutes if you do not have a scan tool or you don't want to take it to a garage. if you do not replace it, it will hurt your fuel milage some. also if you let if go for a long while like that more than likely once you replace the bad one, you will end up having to replace bank 1 sensor one, since it is doing all the work now. the is nothing wrong with your ecm if it told you that it was an o2 sensor.
the o2 sensor 1 one sensor 1 is generally the one you can see by lifting the hood right off the manifold. sensor 2 is generally further down the exhaust by the catalytic converter. You should change the sensor as it is linked to the autos fuel and can effect performance a little but its nothing major. Your emissions will not pass without it though. If you have to try the guess check method try changing one it its not it switch it and change the other one. Good Luck
Yes, there is a downstream oxygen sensor. It is located at front center of floor pan in the exhaust pipe. Before replacing I would reset check engine light one time to eliminate the fact that it might be a one time malfunction. If the check engine light does turn back on and it is the same code, then I would replace it. There is no reprogramming needed in ECU...just replace it.
