P0766 MERCEDES-BENZ Code: Meaning, Causes, and Symptoms | OBD2 Codes
P0766 MERCEDES-BENZ – Shift Solenoid ‘D’ Performance or Stuck Off
P0766 MERCEDES-BENZ Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light),Transmission will not shift gears
P0766 MERCEDES-BENZ Possible Causes
Low transmission fluid level,Dirty transmission fluid,Faulty shift solenoid ‘D’ valve,Shift solenoid ‘D’ valve harness or connectors,Shift solenoid ‘D’ valve circuit is open or shorted
P0766 MERCEDES-BENZ Description
Shift solenoid valve ‘D’ is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the park/neutral position (PNP) switch, vehicle speed and Engine Control Module (ECM) (throttle opening). Gears will then be shifted to the optimum position.