P2721Pressure Control Solenoid D Control Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2721 is logged when the control line of solenoid D reads too high, typically because it touches battery positive. GM's 2016 six-speed tables describe it as circuit high covering an open or a short to power, set after 0.3 s in one trip, so on those units an open line can land here too. The 2023 Corvette dual-clutch TCM tests with the driver on and sets it when the sense voltage exceeds a limit that rises with supply, about 0.7 V below 11.5 V and 1.1 V above 15.5 V (Type A); Ford's TR9070 calls this shorted load. Subaru bulletin 16-149-25 lists P2721 on 2020-2023 Legacy, Outback and Crosstrek with the TR580 CVT: condensation reaches the control valve connector, and a new control valve and connector cover fix it.
- What you may notice
- MIL on and fail-safe operation
- Shift shock or missing gears
- Fault may follow wet weather or washing
- Likely causes
- LikelyMoisture in the control valve connector (Subaru TR580)
- PossibleControl wire shorted to a supply circuit
- PossibleOpen circuit on units that report it as high (GM six-speed)
- RareFaulty solenoid D or TCM driver
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.