P0900: Clutch A Actuator Control Circuit/Open
Standardized SAE J2012 code · P09xx — Transmission
What does P0900 mean?
Watches the drive circuit of the actuator that opens and closes clutch A in an automated or dual-clutch transmission. The code sets when the module detects an open circuit, so it cannot energise the actuator. Ford documents it for the DPS6 PowerShift gearbox in the Fiesta and Focus, where each dry clutch is moved by a three-phase electric motor with hall sensors; P0900 is the open-circuit check of the clutch A motor, alongside P0902 (short to ground) and P0903 (short to power). Ford program 20B23 for some 2016-2017 Focus cars lists P0900 with a lit check engine light and erratic shifts caused by failed clutch actuator motors. P090A is the same fault on clutch B.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Check engine light on
- Erratic or missed shifts, vibration on take-off
- Transmission in limp mode, possibly no drive
Common causes
- High Failed clutch A actuator motor (open winding or internal fault)
- Medium Loose connector or broken wire between TCM and actuator
- Low Faulty motor driver inside the TCM
Likelihood is a general estimate across vehicles; your make and model may differ.
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