I have a CEL issue with codes as follows:
P2271, P2099, P2198, P2273, P0041 (all of which are bank 2 rich codes)

My car is a 2011 997TT. I installed a test pipe this past summer and that's when the light came on. I then installed a high flow 200 cat with bigdaddiesgarage O2 extenders but after 100 miles, the CEL came back on. I've been driving with this light on for the past 8 months and soon I have to inspect the car. I spoke with Bigdaddies via email and explained the situation and they said the O2 sensors are working because if they weren't it would trigger a "lean" code. I am not a mechanic but this seems odd....I am assuming the car throws a "rich" code becaused more gases are escaping. Is this true? My last resort is a tune but I would rather fix this at a cheaper cost. Does anyone have any suggestions? Also, the CEL light did turn off twice, both times when it was rainy and damp (We rarely get rain if any).

 

p0041 is usually indicative of fouled plugs. The rich/lean condition is usually sensed by the primary sensors, not the secondary's which are the ones you're trying to fool with the extensions. You're getting too much unburned fuel to the cats/exhaust. They will usually backfire in this situation as well.
GL, just my thoughts.....

 

Thanks for your info. What do you recommend to correct this problem, replace the O2 or get a tune? I need to get this resolved fairly soon

 

If it's the plugs, gotta change them I would think, or fix the underlying cause. A tune won't do anything except turn off the CEL, which isn't a good idea. It's possible the exhaust is the issue, one could simply re-install your stock system and see if it clears the condition?

 

install the stock cats and just get a cat back. the CEL hassles are not worth the 10hp.

 

Darn it man I am out here this weekend and would have brought my Durametric for you to use if I had known.

 

Squat: How would the Durametric help? I dont know much about this device other than reading codes.

 

It would tell you what was wrong then you could reset it and see if it was an anomaly