As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO DOOR CAUTION MESSAGE ILLUMINATES. RETURNED TO THE FIELD. LANDING UNEVENTFUL. INTERROGATED MDC FOUND "PX102 FAILED/WIRING DI126: UNREASON/OPEN WIRE". C/W ADJUSTMENT OF THE AFT BAGGAGE BAY DOOR PROX SENSOR PX102 IAW AMM 52-70-02-820-802(A02). OPS TEST OF THE AFT BAGGAGE BAY DOOR GOOD IAW 52-31-00-710-801. RETURNED TO SERVICE.