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New bike, coding out, guage says F-1. Used the wire loop, it said c-21 (ATS) Replaced the sensor, it is still coding out. Previous owner installed a smog block off kit, K&N, and Cobra pipes. There is no oxygen sensor on the pipes... hmm. Anyone had a issue similar to this? Any help would be appreciated.
Super Dave
 

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Given all the changes that have been made to it.......and maybe some you don't know about........I suggest that it likely is NOT a good project for you. Parts may be hard to find.
Putting it all back to stock might be needed to have a known starting point.

Does it run even though the FI (fault indicator) light is on ??
If yes, and it runs reasonably good maybe you should just ignore the light.
 
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