I picked up an O2 sensor adapter from WMW to try to stop my Alta header from throwing Code P2096-Post Catalyst Fuel Trim System Too Lean (Bank 1) The check engine light went off and stayed off for approx. 350 miles and then came back on. I just did a code scan and P2096 came up, I cleared the code but expect the 'check engine' light to come back on as it has been on more than off since I installed the Alta header a few years ago.
Any suggestions on getting the P2096 code to stay off?
Is the P2096 code going to cause any long term engine damage?
I have a 2006 MCS with Alta Header with newer MagnaFlow CAT (that's is the same as what Alta originally used), Borla cat-back, 15% pulley, JCW 380 fuel injectors, Craven CAI, etc.
I do not notice any performance issues but it sure nice not to see that stupid light on.
thanks for any info!
Gary

 

Check for exhaust leaks causing the o2 sensor readings to be skewed.

 

I would have a closer look at that header. That gasket failure may well be the cause of the code, considering that the O2 sensor bung is too close to the flange, but have a look at the collector welds. See any cracks? I wouldn't be surprised if there's another cause for that code

 

Thanks for the suggestions.
Gary