P2096 code mostly stock

[Seal]

Corksport TMIC, K&N air intake, Cobb Catback exhaust are the only mods on the car right now. I’ve read this code can be the result of many things. Any suggestion on where to start troubleshooting?

Year/Make/Model: 2011 MS3
Mileage: 107500k
Location:SF Bay Area CA
Concern: CEL and P2096 code
DTC's: P2096 Post Catalyst Fuel Trim System Too Lean Bank 1
Modifications: Corksport TMIC, K&N cold air intake, Cobb Catback exhaust.
ECU/Tuning Software: Stock
Tuner:
Is the concern intermittent? CEL and code just came up. My fuel tank was near empty so I waited to see if that may play any role but after a refuel and was able to test with OBD2, code remains.
Can you duplicate the concern? No
Recent Repairs: None
Correction:

 

[jsmith]

https://mazdaspeeds.org/index.php?threads/troubleshooting-template.13117/

^I'd start there. It cuts down on replies if most of the questions are answered up front.

 

[Seal]

Thank you. I added the template to my OP.

 

[Easter Bunny]

Check for intake and exhaust leaks.

How long have mods been on the car

 

[Enki]

Also logs

 

[Seal]

Check for intake and exhaust leaks.

How long have mods been on the car

exhaust and intake have been on since I got the car. I added the TMIC about 4-5 months ago.

 

[Seal]

Ended up being a software update needed. Took it to a dealer to have them update the software.

I took it to a local shop as I’ve been busy with work and my house to try and troubleshoot it. Shop said it was the o2 sensor and then the code came back two days later. Then said it was the fuel/air sensor. Same thing, code came back two days later.

I should have taken it to the dealer from the beginning but the local shop has taken good care of my Tacoma in the past and the local Toyota dealer burned me in the past. Thankfully it is resolved.