P0771 — Shift Solenoid D Stuck On
Drivable short-term, but fix now to avoid damage.
What P0771 means
This code means the powertrain computer detected that shift solenoid D appears to be stuck in the open or applied position, so it can't control fluid flow the way it should. It usually points to a stuck or clogged solenoid, dirty transmission fluid, or wiring and valve body problems. It's commonly fixed by replacing the solenoid and servicing the fluid, and most repairs don't require a full transmission rebuild.
Common symptoms
- Check engine light is on
- Harsh or delayed gear shifts
- Transmission stuck in one gear or limp mode
- Slipping between gears or RPMs flaring
- Poor fuel economy
Common causes
- Shift solenoid D stuck open or mechanically jammed
- Dirty or low transmission fluid clogging the solenoid
- Damaged wiring or connector to the solenoid
- Faulty or worn valve body
- Internal transmission fluid pressure problems
Typical repair cost
$250 – $800
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0771 code?
For short trips, usually yes, but you shouldn't rely on it. A stuck shift solenoid can cause harsh shifts or limp mode, and continued driving can add wear to the transmission. Have it checked as soon as you can.
How much does it cost to fix a P0771 code?
Most repairs run between about $250 and $800. The cost depends on whether you only need a solenoid replacement and fluid service, or whether the valve body or wiring also needs work.
Is a P0771 code serious?
It can be. While the car may still move, a stuck solenoid affects how the transmission shifts and can lead to more costly damage if ignored, so it's best to address it promptly.
What is shift solenoid D?
Shift solenoid D is an electronically controlled valve inside the transmission that directs fluid to engage the right gear. When it sticks on, the transmission can't shift properly, which triggers this code.