P2724 code meaning
Pressure Control Solenoid E Stuck On
Powertrain system Generic code P27xx codes Check engine light
What P2724 means
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.
P2724 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 14 hours
- Clears after repairAfter a drive cycle
Symptoms of P2724
- Wheels lock or vehicle stops abruptly at low speed
- Tie-up or harsh shift feel
- MIL on, transmission may hold a safe gear
Common causes of P2724
- Most likelyValve or regulator held in the applied position by debris
- PossibleInternal TCM fault (GM 8L90, PIP5646)
- PossibleSolenoid E mechanically stuck
- Less likelyRestricted clutch exhaust passage
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Pressure control solenoid eValve body
What each part of P2724 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 7 | Area: transmission. |
| 24 | The exact fault in that area. |
What to do next
- Note P2724 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2724
What does P2724 mean?
P2724 means "Pressure Control Solenoid E Stuck On". P2724 flags valve E as delivering pressure when it should not, so its clutch stays engaged too long. It is a generic code, so it means the same on every make.
Is it safe to drive with P2724?
Drive gently and only to a workshop. With P2724 the car can go into limp mode (reduced power) to protect itself.
Will P2724 fail an emissions test?
Yes, it can. P2724 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2724 to fix?
Difficulty: workshop only. A typical repair takes 1 to 14 hours of work. This is a job for a workshop.
Will P2724 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.