As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 4038 - CREW WAS ALERTED BY ELECTRONIC ENGINE CONTROL FAIL INDICATION LEFT SIDE. ELECTED TO RETURN TO GATE. OUT STATION MAINTENANCE CLEANED THE EEC CANNON PLUG CONNECTORS IAW MM 72-00-00. GROUND RUNS CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.