OBD Code P0766

Shift Solenoid “D” Performance or Stuck Off

What’s mean?

OBD2 Code P0766 Definition:
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.

Symptoms

Possible sumptoms of P0766
– Engine Light ON (or Service Engine Soon Warning Light) – Transmission will not shift gears.

Possible Causes

Possible causes of P0766
– 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 The Error code is generally activated on detection of the following conditions: The P0766 code is detected when the ECM has detected a mechanical fault with the solenoid energized, valve stuck off

Possible Solutions