My '06 FLHX GLIDE SHOWS A TROUBLE CODE OF P0374 (CPK Sensor Synch error). Sensor and wiring all checked good.Troubleshooting guide suggest to replace ECM. Inquired about replacing ECM and was told that it must be done with a computer to be able to mate it to the other electronics. I also found out that an ecm from the secondary market can be installed and mated without a harley computer. WHAT CAN I DO? ANY SUGGESTIONS ??? HELP HELP