O2 readings in AWRON Display

[Nicholas4311]

Hi,

I installed a AWRON display in my car, and noticed that the Bank 1 and Bank 2 readings are very different.

Bank 1 changes according to Throttle movement/RPM, but bank 2 is little movement on.

This is a E82 car rebuilt to 1M with 2011 E92 M3 Engine and transmission+++

No errors with ICarly, Need a new cable to read codes with proper software.

A little video..

[amrazM]

Doesn’t look like bank two is reading anything, verify the sensor is working properly then recheck the wiring for the awron

[Nicholas4311]

Witch sensor to check?
As there is 4 sensors on this engine?
What are the different on pre and post sensors?

[enycerz]

Originally Posted by Nicholas4311

Witch sensor to check?
As there is 4 sensors on this engine?
What are the different on pre and post sensors?

You only need to monitor the two o2 before the cat. those two o2 after the cat does nothing but detects if you have a functioning cat or not.

[m3boost]

you have a bad o2 pre cat sensor, change both banks to fix issue.

[M3 Number 86]

Bank 2 is driver side if in the US (left hand drive). Looks like it's dead. When you give it throttle and the numbers get lower it's showing a more rich reading. Funny thing is, it should be fluctuating up down up down at idle though.