Texmac1011
New member
I got everything hooked up and the bike is running great, but 10-15 seconds after start up, the check engine light comes on. Any ideas?
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Need Help After Installing Power Commander V
- Thread starter Texmac1011
- Start date
Firefly
Active member
Double check all connections-- especially intectors. Also make sure you didin't knock a hose off-- and that you have the ground hooked up and proper connection to the TPS.....
Texmac1011
New member
I installed the PCV and O2 modifier, ran the bike and did not have a check engine message. After installing the auto tune, the message came up. All the connections look good and the bike runs great, so I guess I will take it to my dealer and let him figure it out.
Texmac1011
New member
One other thing puzzled me. The O2 modifier had 2 connections on it. One, of course, plugged into my connection, the other I have no idea. I assume it is pigtailed for a different connection on a different bike?
Ah, I think it is the connection for the stock O2 sensor if not using an autotune.
Ah, I think it is the connection for the stock O2 sensor if not using an autotune.
Last edited:
Firefly
Active member
The o2 modifier that comes with the PCV is a y connector type--- one side plugs into the original o2 sensor and the other where the o2 sensor used to plug in. You MUST have the original o2 sensor installed in the y pipe and plugged in that way. The auto tune sensor requires its own bung on the y pipe--- usually right next to the original o2 sensor.
Texmac1011
New member
Well that's confusing. The auto tune directions say:
"many aftermarket exhausts come with an O2 sensor. If your system comes with an M18x1.5mm thread then you can simply use this location for the auto tune sensor".
The instructions don't say to leave or remove the stock O2 sensor.
On the plus side, you have this unit installed, so I know your way is the right way. Fixing this should take care of my O2 sensor fault the BUDS says I have. Thanks for the help!
Texmac1011
New member
Finally! Everything is connected and operating right. Once I connected the stock O2 sensor, the check engine light went away. I have only been for one ride, so the autotune has made a few changes, but I will get it dialed in soon. I am starting with the stock map, so it may take a few trim changes to get it right. Already the throttle response is better and all the backfiring has stopped. So far, I have only been able to get the throttle% down to 33% at idle, but I'm done for this weekend.
Firefly, thanks for your help!
Firefly, thanks for your help!
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