Torque limit of engine (SEM) not possible
â–¶ How to fix
Check the cable harness between the coolant temperature sensor and control unit pins 58 and 35. If no fault is found, contact an Allison dealer.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
The engine does not respond to the request for torque reduction from the control unit.
Possible cause
One cause of this fault code is that the engine does not allow the gearbox control unit to limit torque.