Pressure Control Solenoid "E" Control Circuit Low
P2729 indicates the transmission pressure control solenoid E circuit is detecting low voltage or current, meaning the PCM cannot properly command this solenoid. This causes the transmission to enter limp mode and may result in harsh shifting, slipping, or overheating as the transmission cannot regulate pressure correctly.
What You Might Notice
- Check Engine Light illuminated
- Transmission shifts hard or bangs into gear
- Transmission slips when shifting
- Increased fuel consumption
- Transmission overheating or entering limp mode
Most Common Causes
- 1
Pressure Control Solenoid E failure
The solenoid itself may be burned out, stuck, or electrically failed, preventing proper circuit continuity and causing low signal voltage.
- 2
Wiring or connector issues
Corroded connectors, damaged wiring, loose connections, or poor grounds in the solenoid E circuit can result in high resistance and low voltage signals.
- 3
PCM or transmission control module fault
A faulty transmission control module or PCM may fail to output proper voltage to the solenoid circuit, even if the solenoid itself is functional.
- 4
Internal transmission hydraulic issues
Low transmission fluid, clogged solenoid passages, or internal transmission damage can cause the solenoid to malfunction or the circuit to fail.
How to Diagnose It
- 1
Check Pressure Control Solenoid E failure — The solenoid itself may be burned out, stuck, or electrically failed, preventing proper circuit continuity and causing low signal voltage.
- 2
Check Wiring or connector issues — Corroded connectors, damaged wiring, loose connections, or poor grounds in the solenoid E circuit can result in high resistance and low voltage signals.
- 3
Check PCM or transmission control module fault — A faulty transmission control module or PCM may fail to output proper voltage to the solenoid circuit, even if the solenoid itself is functional.
- 4
Check Internal transmission hydraulic issues — Low transmission fluid, clogged solenoid passages, or internal transmission damage can cause the solenoid to malfunction or the circuit to fail.
How to Fix It
- 1
Test and replace Pressure Control Solenoid E
Use a multimeter to test the solenoid coil resistance and PCM voltage output. If resistance is out of specification or voltage is absent, replace the solenoid with an OEM or quality aftermarket unit.
- 2
Inspect and repair wiring and connectors
Visually inspect the solenoid harness for corrosion, damage, or bent pins. Clean connectors with electrical contact cleaner, repair damaged wiring, and verify secure connections to ensure proper voltage delivery.
- 3
Check transmission fluid level and condition
Low or dirty transmission fluid can prevent solenoid operation and damage internal components. Check fluid level when transmission is at operating temperature, top up if needed, or perform a fluid change if discolored or burned smelling.
- 4
Test PCM/TCM and replace if faulty
If solenoid, wiring, and fluid checks pass, the transmission control module or PCM may be failing to output proper signals. Have a dealer or transmission specialist confirm with diagnostic equipment before replacement.
Need a deeper diagnosis?
Search for related repair guides or browse by system.