Shift Solenoid E Stuck On
Diagnostic trouble code P0772 indicates that the transmission control module (TCM) or powertrain control module (PCM) has detected that shift solenoid 'E' is mechanically or hydraulically stuck in the 'on' position. The computer sets this code when the actual transmission gear ratio does not match the commanded gear ratio associated with this specific solenoid's operation.
A stuck shift solenoid can cause erratic shifting, transmission slipping, or force the vehicle into a restricted limp mode. It should be diagnosed and repaired immediately to prevent severe internal transmission damage.
Common symptoms
- Illuminated Check Engine Light
- Transmission fails to shift into or out of certain gears
- Harsh, delayed, or erratic shifting
- Transmission slipping during acceleration
- Vehicle enters limp mode (restricted to a single gear)
Likely causes
- Dirty, degraded, or contaminated transmission fluid
- Defective or mechanically stuck shift solenoid 'E'
- Clogged transmission filter or blocked hydraulic passages
- Faulty transmission valve body
- Damaged wiring or poor electrical connections in the solenoid circuit
- Faulty Transmission Control Module (TCM) or PCM
What to check before replacing parts
Check the transmission fluid level and condition.
Look for: Low fluid levels, a burnt smell, or heavy debris/metal shavings which indicate internal wear and can cause the solenoid to stick.
Scan for other related transmission codes.
Look for: Additional gear ratio or solenoid electrical codes that might point to a broader electrical issue, sensor failure, or valve body problem.
Inspect the wiring harness and connectors for the transmission and shift solenoid 'E'.
Look for: Corroded pins, melted wires, or loose connections that could cause a short to power or ground in the solenoid circuit.
Perform a resistance and continuity test on shift solenoid 'E' using a digital multimeter.
Look for: Resistance values outside the manufacturer's specified range, indicating an internal short or failure of the solenoid coil.
Apply direct voltage to the solenoid (if accessible or removed) to test mechanical operation.
Look for: A crisp, audible click; if it does not click, clicks weakly, or remains open/closed regardless of power, the solenoid is mechanically stuck.
This page explains the generic P0772 definition and is general reference information, not a diagnosis for your specific vehicle. Actual causes, severity, and repairs vary by make, model, engine, and mileage — always confirm with a scan tool and a qualified technician before replacing parts.
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