What Does P0772 Mean?
The TCM has detected an electrical fault in the Shift Solenoid D circuit. This means the solenoid's electrical circuit is shorted, open, or has resistance outside the expected range. The solenoid may be permanently energized or de-energized, preventing proper gear selection. This is an electrical diagnosis rather than a mechanical/hydraulic performance issue.
Common Causes
35%
Failed shift solenoid D (internal coil short or open circuit)
25%
Damaged wiring harness between TCM and transmission connector (chafed, corroded, or broken wires)
20%
Corroded or damaged transmission external connector or internal pass-through connector
12%
Faulty TCM solenoid driver circuit
8%
Poor ground connection at TCM or transmission case
Diagnostic Steps
1
Measure shift solenoid D resistance at the transmission connector — compare to manufacturer specification (typically 10-25 ohms for most applications).
2
Inspect the transmission external wiring connector for corrosion, bent pins, moisture intrusion, or pushed-back terminals.
3
Check for voltage and ground signals at the solenoid connector with the TCM commanding the solenoid on and off.
4
Perform a wiggle test on the wiring harness between the TCM and transmission while monitoring the solenoid circuit for intermittent opens or shorts.
5
If wiring checks good, remove the solenoid and test it directly with a bench power supply to verify coil integrity.
6
If solenoid and wiring are good, test the TCM driver circuit output with an oscilloscope to verify proper PWM signal.
Estimated Repair Cost
$150 - $900
Parts + labor, varies by vehicle and location
The TCM has detected an electrical fault in the Shift Solenoid D circuit. This means the solenoid's electrical circuit is shorted, open, or has resistance outside the expected range. The solenoid may be permanently energized or de-energized, preventing proper gear selection. This is an electrical di...
The most common cause of P0772 (Shift Solenoid D Electrical) is: Failed shift solenoid D (internal coil short or open circuit)
Typical repair costs for P0772 range from $150 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle may enter limp mode, limiting it to a single gear for safety. Driving is possible at reduced speeds but shifts will not occur normally. Repair promptly to restore full transmission function and avoid overheating the transmission.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0772 to identify the root cause.
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Quick Info
Category
Powertrain
System
Automatic Transmission
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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