I removed my Invidia and went back to OEM only to throw a CEL a week later for my secondary o2. Oddly enough it went off for a week and came back the other day. Pulled the code and it's a p0137. I haven't pulled the sensor yet to see if the element went to hell, but there hasn't been any rattling noise to suggest the tip fell off. Nor do I have the error suggesting the cat took a dump.

However, my car has more noticeably done the stumble recover when you let off the throttle and it dips below idle. I almost wondered if the plugs could be a cause for concern, potentially dumping too much fuel in. I'm not getting a too lean/rich warning, just thinking ahead...

Has anyone had a similar scenario?

 

The internet had 2 o2 sensors connected to each other

 

That's like two d00ds having teh secks