As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
POWERPLANT MESSAGE ON ENGINE DISPLAY ON CLIMB. DIVERTED AND ACCOMPLISHED AN UNEVENTFUL LANDING. FOUND FAULT CODES 336 A/B & 340 A/B IN THE CDS. FOUND CONNECTORS P70 & P72 LOOSE. CLEANED, TREATED AND TIGHTENED & APPLIED HEAT SHRINK. GROUND RAN THE ENGINES AND THE F/C'S DID NOT REOCCUR. RETURNED TO SERVICE. NO PARTS REPLACED.