P2723 indicates that the Powertrain Control Module (PCM) has detected an abnormal performance from the transmission pressure control solenoid E, typically reporting that the solenoid is stuck in the "off" position. This fault can lead to improper line pressure regulation, causing harsh shifting, reduced performance, or a fail‑safe (limp‑mode) condition. The code is set when the actual solenoid operation does not match the PCM’s commanded state.
Internal electrical failure (open/short) or mechanical sticking can prevent the solenoid from activating, causing the code to set.
Insufficient fluid level, dirty fluid, or wrong fluid specification can restrict hydraulic flow and cause the solenoid to appear stuck off.
A blocked filter or restricted line reduces pressure to the solenoid, leading to a performance fault.
Damaged wires, corrosion, or poor terminal contact at the solenoid circuit can interrupt the signal, causing an apparent solenoid failure.
A neighboring pressure sensor or solenoid that provides incorrect data can trick the PCM into flagging solenoid E.
Rarely, the transmission or engine control module itself may misinterpret signals; this should be considered only after other causes are ruled out.
Rarely. Most cases stem from the solenoid itself, fluid condition, or wiring issues. The PCM should only be suspected after those components have been verified as functional.
Driving is not advisable because the fault can lead to low line pressure, harsh shifting, or forced limp‑mode, which may damage the transmission if ignored.
It regulates the transmission’s main line pressure by controlling fluid flow; proper operation ensures smooth gear changes and protects internal components.
Usually not. The solenoid, fluid, filter, or wiring are far more common culprits. PCM replacement should only be performed after a thorough diagnosis rules out those items.