Fault code help: e92 M3 "increased emissions"

Hi all,

Recently got the "increased emissions" error popup on my car with the check engine light.

Ran the codes and it gave me the following:

2B59 - Coolant thermostat monitoring

2771 - Oxygen sensor dynamic diagnosis bank 1

2772 - Oxygen sensor before cat bank 2.

Anyone could help me with what the issue is thats causing this? The check engine light + increased emissions error went off after ~2-3 days and then came back on and went off again.

Thanks in advance!

It's exactly what the codes gave you. You need to change your o2 sensors

oy vay


Have you checked this thread
http://www.m3post.com/forums/showthread.php?t=928325

threw first code, had to replace thermostat a couple weeks back. 55k miles.

BKarktic3 wrote

threw first code, had to replace thermostat a couple weeks back. 55k miles.

How much did it cost you?

The thermostat parts totalled to ~ $300 before the housing which is another $300

edit: without labour

tokic_o wrote

How much did it cost you?

The thermostat parts totalled to ~ $300 before the housing which is another $300

edit: without labour

had some other maint items done at the same time, but believe parts and labor were in the $800 range...