Pressure Control Solenoid "E" Control Circuit Range/Performance
P2728 indicates the transmission pressure control solenoid E is not operating within the expected range or performance parameters. This solenoid regulates transmission fluid pressure and when it malfunctions, the transmission may enter limp mode and shift improperly.
What You Might Notice
- Check Engine Light illuminated
- Transmission slips during shifting
- Hard or delayed gear shifts
- Increased fuel consumption
- Transmission overheating
Most Common Causes
- 1
Faulty pressure control solenoid E
The solenoid itself may be stuck, damaged, or electrically failed, preventing proper pressure modulation in the transmission.
- 2
Wiring or connector issues
Corroded, broken, or loose electrical connections to solenoid E can prevent proper signal transmission from the PCM.
- 3
Low or contaminated transmission fluid
Insufficient fluid level or debris-filled fluid can prevent the solenoid from functioning correctly and cause pressure regulation problems.
- 4
PCM or transmission control module failure
A faulty engine or transmission computer may send incorrect commands to the solenoid or fail to read its status properly.
How to Diagnose It
- 1
Check Faulty pressure control solenoid E — The solenoid itself may be stuck, damaged, or electrically failed, preventing proper pressure modulation in the transmission.
- 2
Check Wiring or connector issues — Corroded, broken, or loose electrical connections to solenoid E can prevent proper signal transmission from the PCM.
- 3
Check Low or contaminated transmission fluid — Insufficient fluid level or debris-filled fluid can prevent the solenoid from functioning correctly and cause pressure regulation problems.
- 4
Check PCM or transmission control module failure — A faulty engine or transmission computer may send incorrect commands to the solenoid or fail to read its status properly.
How to Fix It
- 1
Inspect and replace pressure control solenoid E
Locate solenoid E on the transmission, test it with a multimeter for electrical continuity, and replace if faulty. Ensure proper seating and torque all fasteners.
- 2
Check and repair electrical connections
Inspect the solenoid connector and wiring harness for corrosion, damage, or poor connections. Clean connectors with electrical contact cleaner and reseat or replace damaged wiring.
- 3
Service transmission fluid and filter
Drain old transmission fluid, replace the filter, and refill with manufacturer-specified fluid. This removes contaminants that may prevent solenoid operation.
- 4
Diagnose PCM or TCM issues
If solenoid and connections test good, have the transmission control module or engine control module scanned and reprogrammed by a dealer or specialist.
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