As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ENGINE TEMPERATURE STARTED TO FLUCTUATE IN FLIGHT, MAINTENANCE TROUBLESHOT AND TRACED PROBLEM TO ENGINE, SPLIT THE ENGINE AND FOUND THE TERMINAL END WAS LOOSE. THE FACTORY HAD NOT SOLDERED THE END ON PROPERLY. REPLACED THE HARNESS AND RETURNED PART TO MFG FOR WARRANTY.