Powertrain, generic (extended)

P2731 Pressure Control Solenoid F

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

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.

Likely causes

Outdated TCM calibration (GM 9-speed, 18-NA-097, N182200080)
Selectable one-way clutch releasing too slowly
Solenoid F or its regulator valve sticking
Contaminated or low transmission fluid

Symptoms

  • 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

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€80–4,000
Time0–10 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

pressure control solenoid fvalve body

Related codes

P2732P2733P2734P2735P2722P2713

References: gsi.ext.gm.com, static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.