I have a 2006 fatboy and has code po134 code . Open loop front o2 sensor. Bike has no o2 sensors and says none for that year . Looks like Previous owner change pipes and air intake and fuel pack . Bike runs good . Just annoying with check engine light on . Bike was dyno at some point . Dealer want 700 to te dyno it to turn of light . I hear can add a resister ! Where would I begin with doing that ? I see ecm under seat . No connection for or plugs for o2 sensors . Any help would be appreciated

 

If I am understanding you correctly, the bike has an O2 sensor code, but you correctly state it didn't come with O2 sensors for that engine/year. That would mean the entire tune map should be open loop...

You also state it has a "fuel pack" on it. Was it also Dyno tuned with the FuelPak....?

I am unfamiliar with the FuelPak tuner.

I don't know how much control the Vance & Hines FuelPak has, but my guess would be that the tune just needs to be fixed for the lack of an O2 sensor on the front cylinder. There should be no need to totally retune the bike.

Since it isn't setting a code for the rear cylinder, which obviously doesn't have an O2 sensor either, it would seem an O2 sensor base tune was used. The tune was adjusted for lack of O2 sensor for the rear cylinder, yet turning off the O2 sensor feedback was missed on the front cylinder.

Or... It could be the FuelPak itself has developed an issue.

Get someone who understands the FuelPak tuner, or call Vance & Hines for assistance..... There are many on here very familiar with the FuelPak tuner, hopefully one of them will chime in...

The point of my post is to say, IMHO, the dealer is ripping you off if they are saying they need a new tune just to shut off the engine light....