Powertrain, generic (extended)

P2724 Pressure Control Solenoid E Stuck On

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P2724 flags valve E as delivering pressure when it should not, so its clutch stays engaged too long. On the Allison 1000 GM watches the off-going element during shifts: an accumulated fail time of 0.3 s on upshifts, 0.5 s on closed-throttle downshifts or 3 s on direction changes counts as stuck on (Type A). On the nine-speed the check runs through exhaust-delay tables for clutch C5, on the eight-speed through torque and inertia phase tests on clutch 5. The 2023 Corvette dual-clutch TCM reverses the sense for its system pressure pilot valve: a pressure 3 bar below target means stuck on, rated Type B. GM's PIP5646 links P2724, P2727 and P2729 on 2019-2020 Silverado and Sierra 8L90 to rear wheels locking after a hot soak, cured by a new TCM.

Likely causes

Valve or regulator held in the applied position by debris
Internal TCM fault (GM 8L90, PIP5646)
Solenoid E mechanically stuck
Restricted clutch exhaust passage

Symptoms

  • Wheels lock or vehicle stops abruptly at low speed
  • Tie-up or harsh shift feel
  • MIL on, transmission may hold a safe gear

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€300–5,000
Time1–14 h

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

Parts involved

pressure control solenoid evalve body

Related codes

P2722P2723P2727P2729P2715P2733

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