The printer posts 24x.42 paper jam (where ‘x’ denotes the tray number) as the sheet stops in the tray pass-through. See the following images:
Leading edge of sheet stopped in tray pass-through
Note: A 242.42 error code is not technically a paper jam because this error is posted when the speed of the pick motor in Tray 2 stalls while trying to pick a sheet. There may (or may not) be a jammed sheet to actually clear; often the sheet will never make it out of the tray. Sometimes you can just open and close the tray and it will pick the next time.