The service has said trains are running to all destinations subject to delay in some areas.
A spokesman for Metro said: Services are disrupted due to an earlier train failure at Pallion.
"Please leave extra time for your journey."
Earlier on this evening, it said due to a technical issue, some services to South Hylton were displayed as Fellgate on the digital displays.
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It added these services will be operating to South Hylton and apologised for any confusion caused.
No trains were running between Park Lane and South Hylton this afternoon, due to a failed train, with tickets accepted on Stagecoach bus services.