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System too lean but running rich.

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Old Feb 28, 2024 | 02:37 PM
  #1  
janpy16's Avatar
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From: Calgary, Alberta
System too lean but running rich.

I have a 2014 GSR with bolt on and tune from Chag.
recently I've been getting a system too lean code but my wideband never goes lean except for a split second when I let off then it returns to 10-11. (Rich I know because my upstream o2 is dead)
does anyone have ideas why id be getting system too lean but the car is indeed running very rich.
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Old Mar 3, 2024 | 07:53 AM
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WRC-LVR's Avatar
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From: Marietta GA
Maybe cause you upstream O2 is dead....Replace it and then report back...
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Old Mar 3, 2024 | 07:13 PM
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From: Boca Raton FL
Probably an exhaust leak pre o2 sensor
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