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jaysal23 08-14-2012 03:11 PM

bank2 sensor2
What does this (bank 2 sensor 2) mean? I have that code (p0158) and I'm trying to figure out which sensor needs to be switched out. Any help would be would greatly appreciated. :eek:

4.7ho 08-14-2012 03:17 PM

Re: bank2sensor2
Simply means that your o2 sensor after the precat on the passenger side is throwing a fault code. Here's a diagram of sensors for 4.7 > and a list of fault codes >

Frango100 08-14-2012 03:57 PM

Re: bank2sensor2
The upstream sensors 1-1 and 2-1 (upstream seen from the precats) are used for finetuning the fuel/air mixture when in closed loop mode, while downstream sensors 1-2 and 2-2 are used to measure the effectivity of the catalitic converter.
The sensors from the stealer are quite expensive, but they are made by Denso, so you could choose to just get the same Denso P/N as the one you want to change.
Don't use Bosch sensors. Eventhough they make good sensors, the heating of those sensors is too slow for our jeep PCM program and they will trow you an other fault code.
Be aware that the upstream and downstream sensors are not the same.

01grand 08-14-2012 04:25 PM

Re: bank2sensor2
If you go to and read the descriptions carefully on the denso sensors you can find the right one no problem. They are pretty easy to replace especially if you have an o2 sensor socket, but that isn't necessary. That code seems to indicate a faulty sensor, but since it is downstream and not used for fuel trims like Frank said, there is no absolute rush to replace it, other than to get the MIL to go away.

hoffmanestates 08-14-2012 09:26 PM

I just replaced my two o2 on right bank pre and post cat. 100 with tax at Napa denso

G2X tapaTalk

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