A total of 21 of SJ's more than 30 X2000 trains in operation are affected, according to Aftonbladet, which was first to report on the matter.
Around 30 departures have been cancelled. SJ hopes to have the investigations completed by lunchtime on Monday.
Our hope is that we will have had time to go through all the trains during the night and morning so that we can run traffic again, says Lina Edström.
Affected customers are advised to rebook their journey to another departure or cancel and receive a refund. No replacement buses will be provided.
On this scale, it is impossible. Our trains take 350 people, not all of them are fully booked, but it is not possible to get there on that scale.
