code 39 any idea what it is

Cesarortiz23 said:

so you guys might as well start a new post i saw one already but is old and there wasn't really a fix or what it can be

so today i got my power tuner from big gun is called the power box by big gun exhaust.

so once i installed it and installed my slip on exhaust i started to get a check engine light code 39. 3 slow flashes and 9 fast flashes.
another thing i noticed was that my exhaust was shooting a-lot of flames and from my understanding by adding the "tuner" it basically fixes that to not run either rich or lean right?

so i didn't feel comfortable trying to go through the setting of the box because i have no idea how to do it i was jut going to run basically the preset that it comes with it already.

so what i did was i just went ahead and removed the tuner because obviously the bike was not running correctly in my eyes or not liking it, "check engine light" plus flames on acceleration and deceleration on Neutral while revving it.

once i took it off left the exhaust on fired her back up everything back to normal no check engine light at all and no flame spitting out the exhaust if anything not even a little bit of flame.


now what the hell do you guys think is going on
bad power box?
i mean is only 2 connectors ground and the injector plug so i was def connecting it properly...

this power box looks identical to the hmf tuner and i think monster tuner looks basically the same as-well

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GTRowdy said:

Having the same issue with code 39 after doing the big 3 mods. Did you find a solution?

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