After getting help from fellow members on my check engine light question I easily found the diagnostic mode and found the DTC and I thank you. Now what do I do? I am showing a code P2107, which is an EFI module processor internal fault. I have a Thundermax tuner but I do not have a laptop to hook up to the module. Apparently it was a previous fault and not a present one. Should I tried disconnecting power to try clearing the fault or call Thundermax and see what they say? The bike is running fine but I dont want to take any chances of causing further problems. The Indy that installed the tuner got out of the business and I wouldnt trust my local dealer with this problem.

 

I would try disconnecting the Thundermax and check the connector. Could be as simple as a compromised connection. Clean if necessary and reconnect. Sometimes you can improve the connection by simply spraying the connector with an electrical contact cleaner and "working" (disconnect and reconnect) the connector a few times. Clear the DTC and then see if the fault reappears. If not, you're done.

 

You say it's a previous / old code, clear it and see if returns. You said bike runs fine.

 

Code P2107 refers to a +12V issue (missing/low voltage) on pin 52 of your ECM.

The (#52) wire color is Y/GN and is powered by the 'System Relay' itself connecting to the battery via the ECM fuse on wire (#71) BE/GY.

The Y/GN wire (#52) distributes power to the Fuel Pump Fuse, ignition coils and to both injectors.

When pin #27 senses the system relay grounded by the handlebar stop switch pin #72, the ECU expects to sense 12V on pin #52.

If you're not familiar with all this:
- set ignition ON, fuel pump OFF
- remove the 40 Amp fuse
- disconnect and re-insert both fuses (ECU & Fuel pump)
- inspect the right handlebar switch connector
- inspect the large connector of the ECU
- insert the 40 Amp fuse
If the trouble remains you will need to sense where wire #52 gets accidentally grounded.

 

Just clear it and ride it for a while then re check. No code, no problem.