SOLVED 2009 335i 29E0 during cruise

tej98

Lurker
Dec 20, 2021
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Hello, I've been getting code 29E0 during cruising conditions which I see is indicative of bank 1 running lean. Bank 1 has all index 12 injectors that I bought used back in October (with ~38k miles on them) to replace my old leaky set on that bank. They have been fine since then and I recently checked the plugs again and found no fuel on them so I know they are not leaking (I assume they could fail the other way and not flow correctly however). This code just started a few days ago as well. Below are logs at idle, a 3rd gear, and a cruising log.

The car is a 2009 335i 6MT running MHD v9 Stage 2 with the supporting mods. All the vacuum lines, TMAP, spark plugs (NGK 1 step colder at 0.022"), charge pipe, and VRSF 7.5" intercooler have under 10k miles on them.

My observations are that idle STFTs are fine, but bank 1 LTFTs are high at ~22%. Under the 3rd gear log LTFTs are near 0 (which I believe is normal) but STFTs on bank 1 begin trending upward, but do not near the limit of 34%. Another note is that my LPFP is showing weakness towards the end of this log, but it does not make sense that this would impact only bank 1 (atleast I think). The cruising log is interesting as bank 1 STFTs do not go above roughly 13%, but bank 1 LTFTs are once again ~10% higher than bank 2.

I have no idea how old the oxygen sensors are but the car does have 106.5k miles on it. Does it make sense to change the upstream sensors or are these symptoms indicative of other issues?

Idle Log: https://datazap.me/u/tej98/idle?log=0&data=18-19-21-22-23
3rd Gear Log: https://datazap.me/u/tej98/mhd-v9-stage-2-log?log=0&data=3-12-18-19-21-22-23
Cruise Log: https://datazap.me/u/tej98/cruise-1?log=0&data=18-19-22-23

Thanks in advance!
 
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