Code 100F is what was displayed on Sykes ACR4 GM2.with the description as previously stated. We have also had a snap on scanner on.That showed codes 355, PWR Supply Malfunction, and 14 Speed sensor malfuction. We also plugged an OBDII Recorder in,badged as MAC ET50. That gave codes P0711,Transmission fluid temp sensor ?and an unkown code, B0500.SYkes shows fuel pressure of 2,000 bar,even with fuel pressure sensor unplugged.we think the 100F and 355 are probably relevent by description,but cannot find more defined decriptions.Sykes/Mototek help line are struggling to answer their own code 100F.Main relay is working,have checked all fuses.Any light thrown on these codes, or previous experiences would be gratefully appreciated.