X5 F15 NOX Default

[Marc412]

Hi

This what i got with ISTA this morning on my X5F15. I need help to konw what to do.

As the defect is not permanent , Does i have to change my NOX sensor?

Where is the NOX sensor ? Is it difficult to change?

As i see also that the main Battery is faulty or warn out , and the emergency battery interval change i reach, Do you think that faulty battery could be the cause of this fault in the NOX sensor?

I am going to change the main battery?

Thanks for your help