As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OKC - ON PUSHBACK FOR FLIGHT 4188 DURING ENGINE START, THE NR 1 AUTO SHUTDOWN DURING START. RETURNED TO THE GATE. MAINTENANCE FOUND THE LEFT FADEC START ABORT MESSAGE IN MEMORY DUE TO SLOW N2 RESPONSE. MAINTENANCE SUSPECTED ICING. PERFORMED GROUND RUN OF ENGINE. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED.