P2731Pressure Control Solenoid F
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2731 is the parent code for pressure control solenoid F; the standard title names the valve without the kind of fault. GM gives it a concrete job on its nine-speed (GF9) units, where valve F feeds the C6 clutch and the selectable one-way clutch. The 2020 table 20OBDG03A uses P2731 for a stuck-on check in first gear: when the releasing clutch keeps slipping less than 50 rpm for 0.25 s on a garage shift, 0.8 s on a power downshift or 0.15 s otherwise, a Type A fault is logged. GM bulletins call it solenoid valve 6 performance. PIP5556 (2018 Equinox and Traverse) blames a slow one-way clutch release and advises no repair for intermittent cases; 18-NA-097 and service update N182200080 cure stuck-in-first or hesitation complaints with new TCM software.
- What you may notice
- Hesitation or weak acceleration from low speed
- Tie-up feel on the 1-2 shift or stuck in first gear
- MIL on, sometimes only intermittently
- Likely causes
- LikelyOutdated TCM calibration (GM 9-speed, 18-NA-097, N182200080)
- PossibleSelectable one-way clutch releasing too slowly
- PossibleSolenoid F or its regulator valve sticking
- RareContaminated or low transmission fluid
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €80 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.