CEL is on...HELP ME

[ximo03]

Hi guys,

I have a 2015 A3 with USP downpipe with high flow cat and APR stage 2 on it and it was running perfectly fine for almost a year. Recently I'm keep getting CEL and the code is P2270(O2 Sensor Signal Stuck Lean B1S2), I cleared the code and it keep coming back on like every 100-200 miles. I don't believe that the combination of stage 2 and dp with high flow cat will trigger this, any ideas?

Thanks!

[bigxie]

Do you have a spacer installed? I got a similar code (stuck rich) and it was solved by removing the spacer.

I have almost the exact same setup (A3, USP DP, ED Stage 2). I even contacted Eurodyne and they said not to use a spacer.


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[jiannu]

What you need to do is get in touch with APR and see what they can do for you? With stage 2, it SHOULD NOT be getting a cel. Maybe they have an update like v2.1?

[ximo03]

I don't have a spacer on it, really weird. it shouldn't be running lean.

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I went to the shop last week and checked, there is no update on a3 stage 2 since I got the software.