Have had issues over the years with 'false alarms,' usually due to sensor problems (darn glass panels!). Curious if anybody experienced something similar to this. Our 2008 CT suffered a clean break (in-flight) of the right rear exhaust pipe in late Nov '14. Was repaired by certified weld. Lately had experienced a series of 'Right CHT High Temp' alarms on one occasion, stopped after maint ofcr checked and tightened sensor connections. Several flights later taken on 200 nm x-country, fine on outgoing, but on return flight noticed right CHT creeping into yellow zone early in flight. Reduced speed under 5000 rpm as precaution, but continued as oil temps in green (200 - 205 degrees), and right EGT was consistently 40 degrees cooler than left EGT. 40 nm out from base, as soon as I keyed mike to call approach the right CHT alarm triggered, continued intermittently for rest of flight but seemed to be especially when mike keyed. Eventually alarm triggered continuously in pattern, through landing, and even during idle taxiing to hangar. Plane has recently come out of annual (after the exhaust pipe break), everything checked OK. Does this appear to be clearly only sensor issue?