P2723

P2723 means the TCM (transmission control module) commanded pressure control solenoid 'E' on but measured voltage on the control circuit below the rationality threshold — a 'low' fault indicating a short to ground, a failed solenoid coil with shorted windings, a TCM driver failure, or a wiring chafe contacting chassis ground. PCS-E is the line-pressure or shift-pressure solenoid for a specific clutch pack or band element, depending on transmission family. Shop-floor ladder: (1) Scan-tool read live solenoid command (% duty) vs feedback current — a healthy PCS-E pulls 0.5-1.5A at commanded duty; near-0A with the TCM reporting low-voltage = open circuit upstream of the solenoid, while very high current (above ~2A) into a low-voltage fault = shorted coil pulling the rail down. (2) Drop the transmission pan or remove the solenoid access cover and disconnect the PCS-E electrical connector; resistance-check the solenoid coil — typical 8-30 ohms at room temp depending on transmission family; below 5 ohms = shorted, infinite = open, ground continuity = shorted to case (always replace). (3) With the solenoid disconnected, key-on engine-off, backprobe the TCM-side connector for solenoid control voltage — should swing 0-12V on duty cycle; if it stays pulled to ground with the solenoid unplugged, the TCM driver is shorted internally. (4) Inspect the internal harness for chafe at known wear points (typical on most transmissions where the harness passes the valve body). (5) If solenoid and wiring check good but the code returns, the TCM driver stage is the fault. DO NOT probe HV orange-wire circuits with a standard multimeter. Always service HV with Class 0 1000V gloves, isolation tester (Megger), and DC-rated lugged probes. Pack contactor stuck-closed (P0AF1/P0AF2) is the only condition where the orange-wire bus may be live AFTER the service plug is removed. NEVER assume zero potential — always measure with an HV-rated meter.

Vehicle-specific patterns: 2009-2017 Ford F-150 / Expedition / Mustang with the 6R80 6-speed throws P2723 from a known solenoid pack failure around 100-150k miles — Ford TSBs document replacing the full solenoid body assembly rather than individual solenoids. 2007-2013 GM full-size trucks/SUVs with the 6L80/6L90 6-speed see P2723 from internal harness chafe at the valve-body pass-through and from solenoid coil short after extended towing-related heat exposure; the fix is solenoid body + internal harness ($600-$1,400 in parts). 2014-2021 GM with the 8L90 8-speed sees the same code from the well-documented torque-converter shudder pattern that GM addressed with multiple fluid changes and TCM reflashes — confirm the shudder symptom before replacing hardware. 2007-2018 Dodge Ram 2500/3500 with the Aisin AS69RC sees P2723 from solenoid pack wear and from contaminated ATF carrying clutch debris into the valve body. Estimated repair: $400 (solenoid only on the 6L80) to $2,800 (full valve body + flush on the Aisin AS69RC).