Shift Solenoid D Stuck On
The Powertrain Control Module (PCM) or Transmission Control Module (TCM) has detected that transmission shift solenoid 'D' is stuck in the 'on' or engaged position. The computer sets this code when it observes that the actual gear ratio does not match the expected gear ratio commanded by the shift solenoids.
This code requires immediate attention because driving with a stuck shift solenoid can cause severe internal transmission damage. The vehicle will likely enter a protective 'limp mode,' severely restricting speed and drivability.
Common symptoms
- Check Engine Light is illuminated
- Transmission fails to shift into or out of certain gears
- Harsh, delayed, or erratic shifting behavior
- Transmission slipping during acceleration
- Vehicle enters 'limp mode' and is locked in a single gear
Likely causes
- Dirty, degraded, or contaminated transmission fluid
- Defective or mechanically stuck shift solenoid 'D'
- Clogged transmission filter or restricted internal hydraulic passages
- Faulty or sticking transmission valve body
- Damaged, shorted, or corroded wiring and connectors in the transmission harness
- Faulty Powertrain Control Module (PCM) or Transmission Control Module (TCM)
What to check before replacing parts
Check the transmission fluid level and condition.
Look for: Low fluid levels, or fluid that is dark, burnt-smelling, or full of metal debris, which indicates contamination or internal mechanical wear.
Scan all modules for additional Diagnostic Trouble Codes (DTCs).
Look for: Other transmission codes, gear ratio errors, or electrical circuit codes that might point to a broader electrical or hydraulic failure rather than an isolated solenoid issue.
Inspect the transmission wiring harness and external connectors.
Look for: Frayed wires, melted insulation, or corroded pins at the transmission connector that could cause a short to power or ground, keeping the solenoid energized.
Perform a bidirectional control test using an advanced scan tool.
Look for: An audible click or a change in hydraulic pressure when shift solenoid 'D' is commanded on and off; lack of response suggests a failed solenoid or circuit issue.
Test the electrical resistance of shift solenoid 'D' using a digital multimeter.
Look for: Resistance values that fall outside the manufacturer's specified range, indicating an internally shorted or open solenoid coil.
This page explains the generic P0767 definition and is general reference information, not a diagnosis for your specific vehicle. Actual causes, severity, and repairs vary by make, model, engine, and mileage — always confirm with a scan tool and a qualified technician before replacing parts.
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