Powertrain, generic (extended)

P2723 Pressure Control Solenoid E Performance/Stuck Off

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modePossible

P2723 means valve E fails to build the pressure its clutch needs, so that element slips or does not engage. GM's eight-speed table ties E to clutch 5 (C4-5-6-7-8-R) and sets the code after 400 rpm of slip lasting 3 s. On the Allison 1000 GM's tables call the valve PCS 1: if the on-coming clutch has not taken hold after 2 s of slip during a forward shift, a Type A fault follows. Bulletin PIP5100A adds a field cause: shrink-wrap from an aftermarket spin-on filter can block the PCS 1 feed hole, giving no or intermittent reverse. On the 2023 Corvette dual-clutch unit it is the system pressure pilot valve, failed when pressure stays more than 3 bar above target (Type A). Subaru lists P2723 among CVT codes in 18-241-26.

Likely causes

Blocked feed orifice in the separator plate (foreign material, GM Allison 1000)

Low fluid level or pump losing prime, especially on cold starts

Solenoid E or its regulator valve sticking

Worn clutch seals leaking apply pressure

Symptoms

Delayed, intermittent or no reverse
Slip or flare in affected gears
MIL on and range inhibit or fail-safe mode

Repair estimate

DifficultyShop_onlyWorkshop job

Parts and labour€150–5,000

Time1–14 h

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

Parts involved

pressure control solenoid evalve body

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