P2724Pressure Control Solenoid E Stuck On
- 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
- 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.
- What you may notice
- Wheels lock or vehicle stops abruptly at low speed
- Tie-up or harsh shift feel
- MIL on, transmission may hold a safe gear
- Likely causes
- LikelyValve or regulator held in the applied position by debris
- PossibleInternal TCM fault (GM 8L90, PIP5646)
- PossibleSolenoid E mechanically stuck
- RareRestricted clutch exhaust passage
- 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: €300 – €5,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.