Scania fault code 2120

Code 2120 is used by 2 different Scania systems. Choose the control unit shown in your diagnostic tool:

MBS Electric heater E6104, wake-up signal shorted It has been discovered that the wake-up signal to the heater is shorted to earth. Read explanation → ALLISON Allison automatic gearbox Pressure switch 2 (PS2), circuit high Contact an Allison dealer. Read explanation →