P285DShift Fork A Actuator Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P285D points to a fork A actuator line pulled toward ground: a chafed motor phase touching the case, water in the connector, or a short inside the motor. To protect its driver, the module normally shuts the output down at once. In Ford's 2012 OBD summary for the DPS6 gearbox this exact fault, a short to ground on the shift drum A motor, carries P285D; the MIL is requested, as Ford's 2014 code catalogue confirms. That drum handles 1st, 3rd and 5th. Ford keeps the open circuit (P285B) and the short to battery voltage (P285E) separate, and a fault of the motor driver chip itself appears as P2831. A grounded phase can also blow the module's driver, so the wiring should be checked before a replacement module is fitted.
- What you may notice
- Engine lamp on, odd gears locked out
- Car starts in second gear or will not move off
- Code returns immediately after clearing
- Likely causes
- LikelyActuator motor lead chafed through against the transmission case
- PossibleWater or corrosion in the actuator connector
- PossibleInternal short of a motor winding to its housing
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.