P0657 Mercedes-Benz Actuator Supply Voltage A Circuit Open
Possible causes
– Faulty Engine Control Module (ECM)
– ECM harness is open or shorted
– ECM circuit poor electrical connection
– ECM Programming
– ECM harness is open or shorted
– ECM circuit poor electrical connection
– ECM Programming
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P0657 Mercedes-Benz Description
The Transmission Control Moduel (TCM) has detected a voltage supply fault to the hydraulic control unit
Mercedes-Benz Vehicle:Mercedes-Benz C-Class,Mercedes-Benz CL-Class,Mercedes-Benz CLK-Class,Mercedes-Benz CLS-Class,Mercedes-Benz E-Class,Mercedes-Benz G-Class,Mercedes-Benz GL-Class,Mercedes-Benz GLK-Class,Mercedes-Benz M-Class,Mercedes-Benz R-Class,Mercedes-Benz S-Class,Mercedes-Benz SL-Class,Mercedes-Benz SLK-Class,Mercedes-Benz SLS-Class,Mercedes-Benz Sprinter 2500,Mercedes-Benz Sprinter 3500,