AutoCodes - Generic - P0766

P0766 Code - Shift Solenoid 'D' Performance or Stuck Off

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

|P0766 code 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

|How do I fix the P0766 code?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|P0766 code tech notes

When the a transmission solenoid is stuck off, in most cases the problem is not the electrical part of the solenoid; the problem is foreign material obstructing the mechanical function of the solenoid or the flow of the fluid through the transmission valve body. If the transmission fluid is very dirty, it is recommend changing the transmission fluid and if possible removing the transmission pan for further diagnosis. Excessive debris or metal particles on the transmission pan could be an indication that there is a transmission mechanical failure and that the transmission will need to be rebuilt or replaced.

|Cost of diagnosing the P0766 code

Labor: 1.0

The cost of diagnosing the P0766 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|When is the P0766 code detected?

The P0766 code is detected when the ECM has detected a mechanical fault with the solenoid energized, valve stuck off

|What are P0766 code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Transmission will not shift gears

|P0766 code 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.
OBDII Code P0766 - Shift Solenoid 'D' Performance or Stuck Off - AutoCodes.com

|Need more information with the P0766 code?

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|P0766 code information for specific makes

|Need help with a P0766 code?

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|P0766 code comments

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