[nog0odd3ed@gmail.com]

Using BimmerLink on my 2023 X5 B58 engine. Which sensors should I look at to let me know if both Oxygen sensors are working? I just had a spacer removed and need to know that both O2 sensors are giving a 'ready' output.
Anyone?

[GerryC]

For direct read, go to sensor values and add "Condition probe ready for operation before cat" and "Condition probe ready for operation behind cat".

You can also look at the various sensor values that start with "Lambda" which is the name for the O2 sensors.

Alternatively, you can just scan for errors. If they're not working, you'll get an error that references the Lambda sensors.

[nog0odd3ed@gmail.com]

Originally Posted by GerryC

For direct read, go to sensor values and add "Condition probe ready for operation before cat" and "Condition probe ready for operation behind cat".

You can also look at the various sensor values that start with "Lambda" which is the name for the O2 sensors.

Alternatively, you can just scan for errors. If they're not working, you'll get an error that references the Lambda sensors.

Is this good then?

[nog0odd3ed@gmail.com]

here’s screenshot

[nog0odd3ed@gmail.com]

lets see if this time the image shows up on this forum...

[nog0odd3ed@gmail.com]

Originally Posted by GerryC

For direct read, go to sensor values and add "Condition probe ready for operation before cat" and "Condition probe ready for operation behind cat".

You can also look at the various sensor values that start with "Lambda" which is the name for the O2 sensors.

Alternatively, you can just scan for errors. If they're not working, you'll get an error that references the Lambda sensors.

GerryC can you take a look at my screenshot? Is that what I want to see or not exactly?

[GerryC]

Originally Posted by nog0odd3ed@gmail.com

GerryC can you take a look at my screenshot? Is that what I want to see or not exactly?

From that, it appears the sensors are working normally.

[nog0odd3ed@gmail.com]

Originally Posted by GerryC

From that, it appears the sensors are working normally.

that’s what I thought as well but the Readiness monitors still came back as not ready.

Thanks for taking a look

[mhmmX5]

If I may ask OP, why did you remove O2 sensor?

[nog0odd3ed@gmail.com]

I didn’t remove them, I put a spacer on the rearmost one hoping to make the CEL go away due to the performance Downpipe that I’m using. It din’t get rid of the CEL by the way (the spacer on the O2 Sensor)

As of today, the only two possible fixes are:

1. Keep the Downpipe and use the LEIB CAN MIL Deleter which works as advertised. Caveat ** this little device just erases the codes your car springs related to Cat Converter on a constant basis when a code/CEL is triggered. You’ll be none the wiser when it does happen, but what you will end up with is an emissions testing challenge. Such challanged can be ‘gamed’ by doing a precise Drive Cycle as per published BMW Drive Cycle (do a search) and monitoring the readiness senssors using the app OBD FUSION for iOS or Android with a proper ODBII adapter. I use CX adapter. When doing the drive cycle, once the car shows ‘ready’ or all greens except for catalyst efficiency, you drive it in to your nearest inspection center, have them do the ODBII emissions test with the car running and you’ll pass.
2. Swap back to factory downpipe. I wasn’t ready for that option, so didn’t do this. But I still have it and will keep it for when I decide to sell the vehicle.

To be honest, with what I’ve already spent on the Downpipe, spacer, LEIBM Can Mil Deleter, several trips to inspection stations to have 3 failed tests (4th was the charm) plus my time and headaches, I would have been way ahead of the game with the AA Downpipe. (Active Autowerke)

Hope this very long winded answer helps.