Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Critical
Flight Crew Landed in Emergency Condition; Flight Crew Diverted
Aircraft
All crews should be informed and knowledgeable about emergency procedures in order to be prepared for such unexpected events in flight.After an uneventful preflight preparation and exterior inspection we departed ZZZ; myself as Pilot Flying and the Captain as Pilot Monitoring. We climbed to planned cruise altitude without issue. Shortly after reaching cruise and just south of ZZZ1; an ECAM message and associated chime presented on the lower ECAM screen indicating 'ENG 1 SYSTEM FAULT'. We worked through the indicated actions and referenced the COM procedures. As the engine was reduced to idle thrust only; we began a descent and began diversion planning as it became clear that we could not continue to ZZZ2 with this issue at the lower altitude required on a single engine at ZZZ3. Initially ZZZ was selected; but while I was flying and communicating with ATC the Captain in consultation with the dispatcher elected to divert instead to ZZZ4. With plenty of time to prepare we did all necessary tasks for the diversion and proceeded to an uneventful landing on ZZZ's longest runway; XXR; with fire/rescue services on standby. After landing with no issues we taxied to the assigned gate and shut down the aircraft without issue.
A320 First Officer reported an in-flight engine problem required a diversion and single-engine approach and landing.