P2728: Pressure Control Solenoid 'E' Control Circuit Range/Performance
The Powertrain Control Module (PCM) has detected that the pressure control solenoid 'E' (typically part of the transmission valve body) is not operating within its expected range or performance parameters. This solenoid regulates hydraulic pressure for clutch or band application. The code sets when the PCM sees an electrical or mechanical fault, such as high resistance, short, or stuck solenoid, affecting transmission shift quality.
01. Most Common Causes
- Faulty pressure control solenoid 'E'
- Wiring or connector issues (open, short, corrosion)
- Low transmission fluid level or dirty fluid
- Internal transmission mechanical failure
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Harsh or delayed shifts
- Transmission slipping or stuck in gear
- Reduced fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and record freeze frame data.
Step 2: Check transmission fluid level and condition; top off or replace if necessary.
Step 3: Inspect wiring and connectors to solenoid 'E' for damage, corrosion, or loose connections.
Step 4: Test solenoid resistance and compare to manufacturer specifications (typically 4-6 ohms).
Step 5: Perform a transmission pressure test to verify hydraulic circuit integrity.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. Driving with this code can cause erratic shifting, transmission damage, or complete failure. Have it diagnosed and repaired promptly.
How much does it cost to fix?▼
Repair costs vary. Solenoid replacement typically ranges from $200 to $600 including parts and labor. If internal transmission damage is found, costs can exceed $2,000.