The Affinity V was blocking the southern part of the channel, two navigational sources said, but SCA sources said traffic had returned to normal shortly after midnight local time.
The incident took place on the same southern single-lane section of the canal where the giant cargo ship Ever Given ran aground for six days in March 2021, disrupting global trade.
The Aframax Affinity V appears to have lost control in the Suez Canal on Wednesday evening while heading south, according to vessel monitoring service TankerTrackers.
“She temporarily blocked traffic and is now facing south again, but is moving slowly with the help of a tugboat,” TankerTrackers said on Twitter.
Refinitiv ship tracking data and the Marine Traffic website also showed the Affinity V facing south and moving slowly along the channel, surrounded by tugboats.
According to tracking websites, the Singaporean-flagged tanker was bound for the Red Sea port of Yanbu in Saudi Arabia.
The expansion work is due to be completed in 2023.