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08 wrx stage 2. throwing codes

3K views 5 replies 3 participants last post by  Brockton 
#1 ·
hey guys- I have a 08 WRX. I have cobb intake, Turbo XS TB exhaust and cobb V3

Im on stage 2 91+

And I have been getting a couple codes, and wondering what would be causing them, If I delete the codes they go away, but they eventually come back a couple days later

codes that I have been getting

- P0420 catalyst system efficiency below threshold (bank 1)
- P2096 post catalyst fuel trim system too lean bank 1
- P0137 o2 sensor circuit low voltage (bank sensor 2)

I've had the first 2 codes many times and the last code just once.

I sent my datalog to cobb, and they said everything looked good.

Do i just delete the codes, or is there something I should fix?
 
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