P2850
Shift Fork D Unrequested Movement
Shift fork D moves without an actuator command. Hydraulic leakage at the actuator or detent spring failure.
Shift fork D moves without an actuator command. Hydraulic leakage at the actuator or detent spring failure.
Common causes
- high
Internal leak in fork actuator
One of the most commonly reported causes for this code — check this first.
Typical part cost: $660-3080
- medium
Detent spring or ball failed
A plausible cause — test and verify before replacing parts.
Typical part cost: $660-3080
See all causes + fix costs
Create a free Wrenchify account to unlock the rest for P2850.
Unlock causesFree forever · No credit card
First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
Get the full step-by-step diagnosis
Create a free Wrenchify account to unlock the rest for P2850.
Unlock diagnosisFree forever · No credit card
Related codes
See related trouble codes
Create a free Wrenchify account to unlock the rest for P2850.
Unlock related codesFree forever · No credit card
Frequently asked questions
What does P2850 mean?
P2850 means "Shift Fork D Unrequested Movement". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.
What are the most common causes of P2850?
internal leak in fork actuator; detent spring or ball failed — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly. Use the Wrenchify app for a full diagnosis specific to your vehicle.
Get the full P2850 diagnosis for your vehicle
Year, make, model + step-by-step repair help — free plan included.