Powertrain, generic · Transmission

P0768 Shift Solenoid D Electrical

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

A shift solenoid is an electrically switched valve in the valve body. Manufacturers use these codes differently: Ford reports an open circuit with the base code and shorts separately, and the letter is not tied to a valve number (Saab's Aisin 9-5: C = valve S4, D = valve S5). P0768 is the collective electrical code for solenoid D. GM's 2006 Allison tables flag a driver hardware fault for more than 0.1 s, after one trip; Saab's Aisin 5-speed (valve S5) checks current draw and enters limp mode with 'check gearbox'; Hyundai's 8-speed uses it for the valve of the 4 & overdrive clutch and replaces valve and electronic module, then the module if it returns. Ford does not use P0768.

Likely causes

Open or corroded wire, connector or internal harness
Solenoid coil open or shorted
Solenoid supply (high-side switch) missing
Module driver faulty

Symptoms

  • Check engine or transmission warning lamp
  • Limp mode in a fixed gear (Ford: fifth with maximum pressure)
  • Harsh shifts

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–900
Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

shift solenoidtransmission valve bodytransmission wiringtransmission control module

Related codes

P0982P0983P0765P0769P0766P0763

References: gsi.ext.gm.com, saabwisonline.com, static.nhtsa.gov, static.nhtsa.gov.