Scania fault code 28674

Code 28674 is used by 2 different Scania systems. Choose the control unit shown in your diagnostic tool:

TMS Transmission Management System The synchromesh actuating arm is not engaged, instead it returns to the disengaged position during deactivation. Freewheeling retarder cannot be engaged. The synchromesh actuating arm becomes stuck during the engagement movement, but moves back to the end position when the operation is deacti… Read explanation → RET Retarder The synchromesh actuating arm is not engaged, instead it returns to the disengaged position during deactivation. Freewheeling retarder cannot be engaged. The synchromesh actuating arm becomes stuck during the engagement movement, but moves back to the end position when the operation is deacti… Read explanation →