As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTO FAIL LIGHT ILLUMINATED IN CRUISE. GROUNDED - YES. DIVERSION - REF B737-9 FIM 21-31-TASK 801. PERFORMED DCPC BITE FOUND FAULT CPC-PANEL WIRING ON BOTH CONTROLLERS PERFORMED C/B RESET ON BOTH DCPC CONTROL SYSTEMS, RAN GROUND TEST ON BOTH DCPC SYSTEMS. GROUND TESTS PASSED. ALL FAULTS CLEARED.