P0780 MERCEDES-BENZ – Shift Control System Fault

P0780 MERCEDES-BENZ Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light),Transmission shift shock

P0780 MERCEDES-BENZ Possible Causes

Low transmission fluid level,Dirty transmission fluid,Faulty shifting solenoid valve,Shifting solenoid valve harness is open or shorted,Shifting solenoid valve circuit poor electrical connection

P0780 MERCEDES-BENZ Description

The Transmission Control Module (TCM) monitors the transmission mechanical shifting through various sensors. This malfunction is detected when the A/T does not shift as instructed by the TCM. This is not caused by electrical malfunction (circuits open or shorted) but by mechanical malfunction such as control valve sticking,improper solenoid valve operation, etc.