Ive been searching a couple of forums without finding any posts on installation of a Power Commander V on a Triumph Tiger 800. Regardless, Im in the process of installing a PC V and a PC AutoTune on my 2012 Tiger Roadie with ABS and now while nearly complete, Ive run into a baffling problem that I hope the collective may be able to help me solve. The AutoTune needs a switched power supply; I connected its leads to the leads for the heated grips plug; cut the plug off and connected the wires with a simple connector. Now the problem: the fuel gauge does not indicate and the check engine light is lit. Connecting an automotive diagnostic instrument only yielded one possible answer: a problem with the O2 sensor heater. The original oxygen sensor is not used with the AutoTune, instead the AutoTune comes with a wide-band oxygen sensor to connect to the AutoTune and a plug for the OEM lead in the wiring harness, see photo below: What I discovered was that the shunts in this plug were not installed correctly, therefore the make-shift shunts made of safety wire. So just to check, I plugged in the OEM oxygen sensor but the problem remains. Digging further into the wiring diagram and checking for power, it appears that the problem may be the pink/black wire (identified as KB in the wiring diagram) that connects not only the fuel level sensor to the ECU but also the fall detection switch, the air intake temperature sensor, the throttle potentiometer, the MAP sensor and gear position sensor. However, the engine runs just fine and the gear position indicator works correctly, with or without the OEM O2 sensor plugged in. Perhaps this KB wire carries CanBus signals as it does not appear to be a power lead? All the fuses have been checked repeatedly and all work. I am utterly baffled. Any suggestions?